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Showing posts from January, 2018

monitoring - Are there complete System Center Configuration Manager alternatives?

itemprop="text"> I have been researching System Center Configuration Manager 2007 R2 SP2 and struggling to swallow the SCCM pill. The tool seems outdated and not well equipped for managing an environment with the latest versions of Server 2008 R2, SQL 2008 R2, Exchange 2010, SharePoint 2010, etc. I need software that will help me: Deploy new software Monitor what software is deployed Deploy updates Install new server and client OSes with specific configurations Monitor drive space and be able to send out alerts Aggregate event logs so that there is one central place for monitoring the health of an organization Be configurable via script Have a good DR plan so that all the effort poured into setting everything up is not at risk These features line up well with the advertise

monitoring - Are there complete System Center Configuration Manager alternatives?

I have been researching System Center Configuration Manager 2007 R2 SP2 and struggling to swallow the SCCM pill. The tool seems outdated and not well equipped for managing an environment with the latest versions of Server 2008 R2, SQL 2008 R2, Exchange 2010, SharePoint 2010, etc. I need software that will help me: Deploy new software Monitor what software is deployed Deploy updates Install new server and client OSes with specific configurations Monitor drive space and be able to send out alerts Aggregate event logs so that there is one central place for monitoring the health of an organization Be configurable via script Have a good DR plan so that all the effort poured into setting everything up is not at risk These features line up well with the advertised features of System Center Configuration Manager and possibly Operations Manager as well but both of these pieces of software feel old and out of date. Do I have any real alternatives in this market space? I have seen Nagios and Zeno

ssl - Windows Server 2003 TCP port mapping / port forwarding

itemprop="text"> I've recently had an issue with the ISP of a few of my clients in which they've blocked TCP port 25 and de-commissioned their old mail server in lieu of Gmail. Also, our business email has been hosted on Google Apps now for well over a year. This wouldn't be an issue, however our network devices and some applications (which used our ISP's old mail server) have no way to change the SMTP port from 25 to an alternate (let alone enable SSL and some does not allow SMTP authentication). I have, in the mean time, setup a local mail server for sending logs and scan-to-emails for some of our network devices and printers and this is working just fine. We do have a problem though with our Act! Premium for Web 2006 application (which runs on an internal Windows 2003 Standard Server). I have researched these problems quite

ssl - Windows Server 2003 TCP port mapping / port forwarding

I've recently had an issue with the ISP of a few of my clients in which they've blocked TCP port 25 and de-commissioned their old mail server in lieu of Gmail. Also, our business email has been hosted on Google Apps now for well over a year. This wouldn't be an issue, however our network devices and some applications (which used our ISP's old mail server) have no way to change the SMTP port from 25 to an alternate (let alone enable SSL and some does not allow SMTP authentication). I have, in the mean time, setup a local mail server for sending logs and scan-to-emails for some of our network devices and printers and this is working just fine. We do have a problem though with our Act! Premium for Web 2006 application (which runs on an internal Windows 2003 Standard Server). I have researched these problems quite a bit over the past few days, but haven't found a working solution for what I'm attempting to do. I am looking for an application that could map/forward a

DHCP DDNS not working for Linux clients

itemprop="text"> This is the same problem href="https://serverfault.com/questions/2007/linux-bind-server-serves-address-of-dhcp-windows-clients-but-not-of-dhcp-linux-c">asked here but there is no indication it was ever resolved for Eddie. Plus, I have already looked at the various answers and tried what was suggested without success. I have a Linux box running a DHCP service (V3.0.7) and BIND9 (9.6.0-P1). I've configured it to have the DHCP service update the local DNS zone. The DNS updates are working perfectly for Windows and Mac clients but not for Linux (Debian Lenny and Ubuntu 8.10). Looking at the dhcp.leases file I see DDNS related information added for the leases handed out to Win and Mac clients but that information is not present for the leases handed out to he Linux clients. Lease file extract: lease

DHCP DDNS not working for Linux clients

This is the same problem asked here but there is no indication it was ever resolved for Eddie. Plus, I have already looked at the various answers and tried what was suggested without success. I have a Linux box running a DHCP service (V3.0.7) and BIND9 (9.6.0-P1). I've configured it to have the DHCP service update the local DNS zone. The DNS updates are working perfectly for Windows and Mac clients but not for Linux (Debian Lenny and Ubuntu 8.10). Looking at the dhcp.leases file I see DDNS related information added for the leases handed out to Win and Mac clients but that information is not present for the leases handed out to he Linux clients. Lease file extract: lease 192.168.10.199 { starts 4 2010/01/07 00:56:43; ends 5 2010/01/08 00:56:43; tstp 5 2010/01/08 00:56:43; binding state active; next binding state free; hardware ethernet 00:0c:e5:4d:9e:e9; uid "\001\000\014\345M\236\351"; set ddns-rev-name = "199.10.168.192.in-addr.arpa."; set dd

linux - Adding disks to add more space to RAID 1+0 array

I have a HP ProLiant DL380p Gen8 server running Ubuntu 14.04.1 LTS. During the installation I had setup RAID 1+0(which I believe is same as RAID 10?): hpssacli ctrl all show config Smart Array P420i in Slot 0 (Embedded) (sn: 00143803246ED20) array A (SAS, Unused Space: 0 MB) logicaldrive 1 (838.1 GB, RAID 1+0, OK) physicaldrive 1I:2:1 (port 1I:box 2:bay 1, SAS, 300 GB, OK) physicaldrive 1I:2:2 (port 1I:box 2:bay 2, SAS, 300 GB, OK) physicaldrive 1I:2:3 (port 1I:box 2:bay 3, SAS, 300 GB, OK) physicaldrive 1I:2:4 (port 1I:box 2:bay 4, SAS, 300 GB, OK) physicaldrive 2I:2:5 (port 2I:box 2:bay 5, SAS, 300 GB, OK) physicaldrive 2I:2:6 (port 2I:box 2:bay 6, SAS, 300 GB, OK) SEP (Vendor ID PMCSIERA, Model SRCv8x6G) 380 (WWID: 500143803246ED2F) The server is now running out of space and I would like to add more disks to it.

linux - Adding disks to add more space to RAID 1+0 array

I have a HP ProLiant DL380p Gen8 server running Ubuntu 14.04.1 LTS. During the installation I had setup RAID 1+0(which I believe is same as RAID 10?): hpssacli ctrl all show config Smart Array P420i in Slot 0 (Embedded) (sn: 00143803246ED20) array A (SAS, Unused Space: 0 MB) logicaldrive 1 (838.1 GB, RAID 1+0, OK) physicaldrive 1I:2:1 (port 1I:box 2:bay 1, SAS, 300 GB, OK) physicaldrive 1I:2:2 (port 1I:box 2:bay 2, SAS, 300 GB, OK) physicaldrive 1I:2:3 (port 1I:box 2:bay 3, SAS, 300 GB, OK) physicaldrive 1I:2:4 (port 1I:box 2:bay 4, SAS, 300 GB, OK) physicaldrive 2I:2:5 (port 2I:box 2:bay 5, SAS, 300 GB, OK) physicaldrive 2I:2:6 (port 2I:box 2:bay 6, SAS, 300 GB, OK) SEP (Vendor ID PMCSIERA, Model SRCv8x6G) 380 (WWID: 500143803246ED2F) The server is now running out of space and I would like to add more disks to it. Is it possible to do this without any down time? Can I just replace one disk at a time with a higher capacity one and once I am done replacing them

domain name system - CNAME in @ (BIND)

Can I put something like this in my .zone file? @ IN CNAME srvr-01.foo.bar. Or is that invalid? If it's invalid, how can I redirect visitors from mydomain.com to the server srvr-01.foo.bar ? (note that I'm not given the server IP, just the domain, which makes me think it could change randomly) EDIT: Sorry, my bad. I replaced NS with CNAME , which is what I actually wanted to write.

domain name system - CNAME in @ (BIND)

Can I put something like this in my .zone file? @ IN CNAME srvr-01.foo.bar. Or is that invalid? If it's invalid, how can I redirect visitors from mydomain.com to the server srvr-01.foo.bar ? (note that I'm not given the server IP, just the domain, which makes me think it could change randomly) EDIT: Sorry, my bad. I replaced NS with CNAME , which is what I actually wanted to write.

apache 2.2 - Permissions for Multiple User VPS

I have a Linode VPS server that I have recently setup and am migrating to from Mediatemple, where I have a VPS managed by Plesk. I dislike the Plesk interface and the mess it makes of a lot of things, but appreciated its ability to allow multiple people access to different domains on a server. I have most everything setup the way I would like it, but am having issues with permissions for my domain directories. I am running Ubuntu 8.04 LTS and Apache 2 as my web server. I have domains successfully located in /var/www/vhosts/domainname.com but have to modify files as root in order to add/change files for the domains. I would like to setup access with the following criteria: Each domain can have a user assigned to it (and allow for the same user to manage multiple domains - could even create symlinks in their home folder to their domains) Certain

apache 2.2 - Permissions for Multiple User VPS

I have a Linode VPS server that I have recently setup and am migrating to from Mediatemple, where I have a VPS managed by Plesk. I dislike the Plesk interface and the mess it makes of a lot of things, but appreciated its ability to allow multiple people access to different domains on a server. I have most everything setup the way I would like it, but am having issues with permissions for my domain directories. I am running Ubuntu 8.04 LTS and Apache 2 as my web server. I have domains successfully located in /var/www/vhosts/domainname.com but have to modify files as root in order to add/change files for the domains. I would like to setup access with the following criteria: Each domain can have a user assigned to it (and allow for the same user to manage multiple domains - could even create symlinks in their home folder to their domains) Certain users will have shell access and may be chrooted to the domain directory they control FTP needs to be setup and able to correctly access the dom

Is this a memory failure being logged (CentOS web server)

itemprop="text"> $ sudo tail /var/log/messages Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "

Is this a memory failure being logged (CentOS web server)

$ sudo tail /var/log/messages Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 chan

amazon ec2 - How good is this MongoDB/EC2 setup?

itemprop="text"> Hi, />I wondered what was a good setup for AWS/MongoDB in terms of machines and the sizes of their disks. Current setup 3 micro machines for the config servers, 1 mongos and arbiters. The 8Gb limit is almost reached. (and I ran the arbiters with --nojournal) per shard : a replica set of 2 machines m1.large with 8Gb for system + 20Gb for data everything is on EBS. Questions is 20Gb too big or too small ? Should I go with 100Gb for example ? Am I supposed to inform mongodb about the 20Gb (or other) disk limit ? Do you see anything wrong that I don't see ? Im new to mongodb and aws but Im an ok experienced SWE Plan of use My database should allow a 100 qps (mostly writes), and should grow up to 1Tb over the next 3 years. The plan is to add as many sha

amazon ec2 - How good is this MongoDB/EC2 setup?

Hi, I wondered what was a good setup for AWS/MongoDB in terms of machines and the sizes of their disks. Current setup 3 micro machines for the config servers, 1 mongos and arbiters. The 8Gb limit is almost reached. (and I ran the arbiters with --nojournal) per shard : a replica set of 2 machines m1.large with 8Gb for system + 20Gb for data everything is on EBS. Questions is 20Gb too big or too small ? Should I go with 100Gb for example ? Am I supposed to inform mongodb about the 20Gb (or other) disk limit ? Do you see anything wrong that I don't see ? Im new to mongodb and aws but Im an ok experienced SWE Plan of use My database should allow a 100 qps (mostly writes), and should grow up to 1Tb over the next 3 years. The plan is to add as many shards as needed, more or less manually (with scripts), when we see that more memory is needed on the database. We will also run a few mapreduce over this and have some scripts that do aggregates with the data over the past 15 minutes,

apache 2.2 - How much free memory should I have on my webserver?

I have a webserver that's currently hosting two Wordpress sites and some java-based collaboration software. The server has 2G of memory and is currently using about 1.8G of the available memory. Right now what's on here is pretty much a pilot project that's getting negligible traffic so I think it's pretty clear that I'll be needing more memory. I was wondering, if I was to release it, how I might anticipate my memory needs based on the traffic it gets. I've poked around on Google and what I've found has been a bit tenuous. Is there a good heuristic that one should use when calculating memory demands as a function of the base (no traffic) load on the server? For reference, the output of free -m can be seen below: total used free shared buffers cached Mem: 2048 1832 215 0 0 0 -/+ buffers/cache: 1832 215

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apache 2.2 - How much free memory should I have on my webserver?

I have a webserver that's currently hosting two Wordpress sites and some java-based collaboration software. The server has 2G of memory and is currently using about 1.8G of the available memory. Right now what's on here is pretty much a pilot project that's getting negligible traffic so I think it's pretty clear that I'll be needing more memory. I was wondering, if I was to release it, how I might anticipate my memory needs based on the traffic it gets. I've poked around on Google and what I've found has been a bit tenuous. Is there a good heuristic that one should use when calculating memory demands as a function of the base (no traffic) load on the server? For reference, the output of free -m can be seen below: total used free shared buffers cached Mem: 2048 1832 215 0 0 0 -/+ buffers/cache: 1832 215 Swap: 0 0 0 To m

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load balancing - SSL in IIS 7 on a subdomain in a web farm

itemprop="text"> I have been having one of the most frustrating days in my entire IT career. I am trying to install an SSL certificate on a subdomain in a web farm. href="http://shop.mydomain.com" rel="nofollow noreferrer">http://shop.mydomain.com needs to ALWAYS be forced to href="https://shop.mydomain.com" rel="nofollow noreferrer">https://shop.mydomain.com I have a temporary cert issued from verisign on shop.mydomain.com I have installed the cert on the server. The website for shop.mydomain.com is set as a host header in IIS with the DNS entry pointed to the same IP as mydomain.com - which is our load balancer. I actually have 2 load balancers (as needed by our ISP). One redirects all traffic on port 80 out to the different servers on port 80. The other pushe

load balancing - SSL in IIS 7 on a subdomain in a web farm

I have been having one of the most frustrating days in my entire IT career. I am trying to install an SSL certificate on a subdomain in a web farm. http://shop.mydomain.com needs to ALWAYS be forced to https://shop.mydomain.com I have a temporary cert issued from verisign on shop.mydomain.com I have installed the cert on the server. The website for shop.mydomain.com is set as a host header in IIS with the DNS entry pointed to the same IP as mydomain.com - which is our load balancer. I actually have 2 load balancers (as needed by our ISP). One redirects all traffic on port 80 out to the different servers on port 80. The other pushes out port 443 to the servers on port 443. shop.mydomain.com is to be the only site protected by SSL at this time. When I add the binding and I navigate to https://shop.mydomain.com it pops up with a warning about the cert being invalid (assumed because this is a test cert), and then it sends the user to http. So, I checked the box "Require SSL and

Cannot setup hostname and FQDN Centos 7

itemprop="text"> I'm now running CentOS-7.0-1406 and looks like i can't setup hostname properly. As far as i know, you need to setup hostname using hostnamectl set-hostname command and write FQDN in /etc/hosts. I have a centos machine and i want to set it's hostname to "server" and FQDN to "server.mydomain.com". I run hostnamectl command and edit /etc/hosts file: [root@server ~]# hostnamectl set-hostname server [root@server ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 {inet_IP_here} server.mydomain.com server At first everything looks fine, console displays hostname when i run hostname and it displays FQDN when i run hostname -f : [root@server

Cannot setup hostname and FQDN Centos 7

I'm now running CentOS-7.0-1406 and looks like i can't setup hostname properly. As far as i know, you need to setup hostname using hostnamectl set-hostname command and write FQDN in /etc/hosts. I have a centos machine and i want to set it's hostname to "server" and FQDN to "server.mydomain.com". I run hostnamectl command and edit /etc/hosts file: [root@server ~]# hostnamectl set-hostname server [root@server ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 {inet_IP_here} server.mydomain.com server At first everything looks fine, console displays hostname when i run hostname and it displays FQDN when i run hostname -f : [root@server ~]# hostname server [root@server ~]# hostname -f server.mydomain.com BUT after i reboot machine and run the same commands again, it starts to display FQDN as hostname: [root@server ~]# hostname serve

apache 2.2 - Ubuntu 12.04 cloud edition on Amazon - Apache2 - /etc

itemprop="text"> I have setup a web server on Amazon with 3 Virtual hosts. For some reason I can't get any of the sites going on it, they all show a 404 error. /var/log/apache2/error.log shows "File does not exist: /etc/apache2/htdocs" I have checked: a2ensite all my virtual hosts actually checked softlinks in sites-enabled access rights in /var/www to 777, in case user is not www-data grep -r htdocs /etc/apache2 (returns nothing) ports.conf has NameVirtualHost directive exactly matching Virtual Hosts What else could this be? ports.conf # If you just change the port or add more ports here, you will likely also # have to change the VirtualHost statement in # /etc/apache2/sites-enabled/000-default # This is also true if you have upgraded from before 2.2.9-3 (i.e. from # De

apache 2.2 - Ubuntu 12.04 cloud edition on Amazon - Apache2 - /etc

I have setup a web server on Amazon with 3 Virtual hosts. For some reason I can't get any of the sites going on it, they all show a 404 error. /var/log/apache2/error.log shows "File does not exist: /etc/apache2/htdocs" I have checked: a2ensite all my virtual hosts actually checked softlinks in sites-enabled access rights in /var/www to 777, in case user is not www-data grep -r htdocs /etc/apache2 (returns nothing) ports.conf has NameVirtualHost directive exactly matching Virtual Hosts What else could this be? ports.conf # If you just change the port or add more ports here, you will likely also # have to change the VirtualHost statement in # /etc/apache2/sites-enabled/000-default # This is also true if you have upgraded from before 2.2.9-3 (i.e. from # Debian etch). See /usr/share/doc/apache2.2-common/NEWS.Debian.gz and # README.Debian.gz NameVirtualHost 107.20.169.163:80 Listen 80 # If you add NameVirtualHost *:443 here, you will also have to change # the Virtual

email - Why is my SPF Record not working?

itemprop="text"> A spammer is using my domain to send spam, and I'm receiving a large amount of bounced email. I have an SPF record on the domain, however it doesn't appear to be having any effect. Receiving MTA's seem to be claiming my domain is neutral about all sending ips. My SPF Record is: v=spf1 include:_spf.google.com -all (The domain is foomatic.net) And as an example, one bounced email contained the following SPF message Received-SPF: neutral (foomatic.net: domain of dhfeo@foomatic.net is neutral about designating 86.105.67.98 as permitted sender) Can anyone shed some light as to why this SPF record isn't working correctly? (The full email header is below) Return-Path: X-YahooFilteredBulk: 86.105.67.98 X-Originating-IP: [86.105.67.98] Received-SPF:

email - Why is my SPF Record not working?

A spammer is using my domain to send spam, and I'm receiving a large amount of bounced email. I have an SPF record on the domain, however it doesn't appear to be having any effect. Receiving MTA's seem to be claiming my domain is neutral about all sending ips. My SPF Record is: v=spf1 include:_spf.google.com -all (The domain is foomatic.net) And as an example, one bounced email contained the following SPF message Received-SPF: neutral (foomatic.net: domain of dhfeo@foomatic.net is neutral about designating 86.105.67.98 as permitted sender) Can anyone shed some light as to why this SPF record isn't working correctly? (The full email header is below) Return-Path: X-YahooFilteredBulk: 86.105.67.98 X-Originating-IP: [86.105.67.98] Received-SPF: neutral (foomatic.net: domain of dhfeo@foomatic.net is neutral about designating 86.105.67.98 as permitted sender) Authentication-Results: mta524.mail.kks.yahoo.co.jp from=foomatic.net; domainkeys=neutral (no sig) Received: from

virtualhost - Apache Default/Catch-All Virtual Host?

itemprop="text"> If I have 3 domains, domain1.com, domain2.com, and domain3.com, is it possible to set up a default virtual host to domains not listed? For example, if I would have: 204.255.176.199> DocumentRoot /www/docs/domain1 ServerName domain1 ServerAlias host 204.255.176.199> DocumentRoot /www/docs/domain2 ServerName domain2 ServerAlias host 204.255.176.199> DocumentRoot /www/docs/everythingelse ServerName * ServerAlias host If you register a domain and point it to my server, it would default to everythingelse showing the same as domain3. Is that possible? class="post-text" itemprop="text"> class="normal">Answer Yes, that should work, except ServerAlias should be "*", with ServerName set to an actu

virtualhost - Apache Default/Catch-All Virtual Host?

If I have 3 domains, domain1.com, domain2.com, and domain3.com, is it possible to set up a default virtual host to domains not listed? For example, if I would have: DocumentRoot /www/docs/domain1 ServerName domain1 ServerAlias host DocumentRoot /www/docs/domain2 ServerName domain2 ServerAlias host DocumentRoot /www/docs/everythingelse ServerName * ServerAlias host If you register a domain and point it to my server, it would default to everythingelse showing the same as domain3. Is that possible? Answer Yes, that should work, except ServerAlias should be "*", with ServerName set to an actual hostname. You might need to make sure that VirtualHost is the very last loaded...

redhat - How to diagnose very bad and slow ext3 behavior?

I'm managing an old admin server running Redhat WS4 update 3, and we have an ext3 volume where I had a large (30GB) sqlite database mounted on /opt. Everytime I do large queries/inserts into this database it raises the IO waits so high that we cannot login to the server anymore, nor sudo to another user, nor edit a crontab file (vi never quits). I'm replacing sqlite with mysql and while backuping the 19GB or mysql directory, I encounter the same problem. Note that these operations are done with a regular user. The server is a PROLIANT DL385 G1 with kernel 2.6.9-34.ELsmp in 64bits. I'm now considering remounting the volume as ext2 to see if journaling is the source to my problem, but I honestly don't really know what to check next. Every serious file copy ends up blocking the server for other users trying to log on, a

redhat - How to diagnose very bad and slow ext3 behavior?

I'm managing an old admin server running Redhat WS4 update 3, and we have an ext3 volume where I had a large (30GB) sqlite database mounted on /opt. Everytime I do large queries/inserts into this database it raises the IO waits so high that we cannot login to the server anymore, nor sudo to another user, nor edit a crontab file (vi never quits). I'm replacing sqlite with mysql and while backuping the 19GB or mysql directory, I encounter the same problem. Note that these operations are done with a regular user. The server is a PROLIANT DL385 G1 with kernel 2.6.9-34.ELsmp in 64bits. I'm now considering remounting the volume as ext2 to see if journaling is the source to my problem, but I honestly don't really know what to check next. Every serious file copy ends up blocking the server for other users trying to log on, and server gets back to normal once the copy ends. I need to pointers to where to look next to explain such behavior (old disk getting slower ? bad kernel w

Should I defrag my RAID volumes?

itemprop="text"> It seems to me that since RAID volumes are logical (as opposed to physical), the layout that the OS believes they have might not correspond to the actual phsyical layout. So does defrag make sense for RAID? class="post-text" itemprop="text"> class="normal">Answer Yes, defrag does still make sense for RAID. While it's true that the layout the OS sees isn't the same as the physical layout, it's monotonic, ie the virtual sectors are in the same order on the disk as they are on the array, it's just they are scattered across disks. Also, the RAID controller will use predictive caching (if it has it) based on an understanding of the array layout, so that will work better if you have defrag. The only time you don't need to defrag is if the underlying s

Should I defrag my RAID volumes?

It seems to me that since RAID volumes are logical (as opposed to physical), the layout that the OS believes they have might not correspond to the actual phsyical layout. So does defrag make sense for RAID? Answer Yes, defrag does still make sense for RAID. While it's true that the layout the OS sees isn't the same as the physical layout, it's monotonic, ie the virtual sectors are in the same order on the disk as they are on the array, it's just they are scattered across disks. Also, the RAID controller will use predictive caching (if it has it) based on an understanding of the array layout, so that will work better if you have defrag. The only time you don't need to defrag is if the underlying storage medium is random access, so don't defrag your USB key, and don't defrag an SSD.

ssl - When using HTTPS Index.html showing instead of ProxyPass reverse proxied site on Centos 7 Apache 2

itemprop="text"> The goal is that external users can connect via HTTPS, go through basic auth on Apache and then view a proxies tomcat site. I have set up a reverse proxy to a tomcat server running on the same machine on a different port with basic auth: (/etc/httpd/conf.d/vhost.conf) NameVirtualHost *:80 ServerName sub.domainx.co.uk ErrorLog "/var/log/proxy/domainx_prox_error_log" CustomLog "/var/log/proxy/domainx_prox_access_log" common ProxyRequests Off Order deny,allow Deny from all Allow from all AuthType Basic AuthName "Proxy Auth" AuthUserFile /var/www/syzygy-auth/CONFLUENCE/.htpasswd Require user ukuser Satisfy any Deny from all Allow from 192.168.0.0/21 ProxyPass / http://sub.domainx.co.uk:8090/ ProxyPassReverse / http://sub.doma