Comments on: Slow disk read speed on ESX4 http://www.vnotion.com/?p=38 Virtualization and Cloud Computing Blog Sat, 26 Jun 2010 04:33:25 +0400 http://wordpress.org/?v=2.8 hourly 1 By: Anton Gostev http://www.vnotion.com/?p=38&cpage=1#comment-1940 Anton Gostev Wed, 03 Feb 2010 13:35:22 +0000 http://www.vnotion.com/?p=38#comment-1940 Looks like the whole http://support.vmware.com is down today. Looks like the whole http://support.vmware.com is down today.

]]> By: james http://www.vnotion.com/?p=38&cpage=1#comment-1938 james Wed, 03 Feb 2010 07:41:49 +0000 http://www.vnotion.com/?p=38#comment-1938 I wasn't able to download the patch from the vmware site. Anybody else have any luck with this site? http://support.vmware.com/selfsupport/download/ I wasn’t able to download the patch from the vmware site. Anybody else have any luck with this site? http://support.vmware.com/selfsupport/download/

]]> By: Anton Gostev http://www.vnotion.com/?p=38&cpage=1#comment-1924 Anton Gostev Mon, 11 Jan 2010 14:04:04 +0000 http://www.vnotion.com/?p=38#comment-1924 Updated the article with resolution! Updated the article with resolution!

]]> By: Anton Gostev http://www.vnotion.com/?p=38&cpage=1#comment-1916 Anton Gostev Mon, 09 Nov 2009 12:07:19 +0000 http://www.vnotion.com/?p=38#comment-1916 To be honest, giving the speed we are seeing with Veeam Backup 4.0 on ESX4 (due to leveraging the vStorage API and changed block tracking), this issue became much less critical for our customers. Even though actual data copy is slow, change tracking still makes incremental backups extremely fast (VM processing speed is hundreds MB/s). So really only full backups are affected - which only happen once in Veeam anyway, thanks to synthetic backup. To be honest, giving the speed we are seeing with Veeam Backup 4.0 on ESX4 (due to leveraging the vStorage API and changed block tracking), this issue became much less critical for our customers. Even though actual data copy is slow, change tracking still makes incremental backups extremely fast (VM processing speed is hundreds MB/s). So really only full backups are affected – which only happen once in Veeam anyway, thanks to synthetic backup.

]]> By: Jason http://www.vnotion.com/?p=38&cpage=1#comment-1915 Jason Mon, 09 Nov 2009 12:01:14 +0000 http://www.vnotion.com/?p=38#comment-1915 I am running v4 and Backup Exec 12.5 also. All resources are local disk direct attached RAID1 volumes. The guest was converted from a physical machine onto a new server. Our D2D2T backup used to take 10hrs when physical. (5hrs for D2D and 5hrs for D2T) Now the D2D backup takes 28hrs and the tape backup around 11.5hrs. (yes the tape is faster). The host doesn't have that much load on it either and everything else is working with acceptable speed. Doing some more perf testing and I am waiting for a new RAID controller to arrive in the hope that this improves my problem but I didn't think my local disk system was too bad. I am running v4 and Backup Exec 12.5 also. All resources are local disk direct attached RAID1 volumes.

The guest was converted from a physical machine onto a new server. Our D2D2T backup used to take 10hrs when physical. (5hrs for D2D and 5hrs for D2T) Now the D2D backup takes 28hrs and the tape backup around 11.5hrs. (yes the tape is faster). The host doesn’t have that much load on it either and everything else is working with acceptable speed.

Doing some more perf testing and I am waiting for a new RAID controller to arrive in the hope that this improves my problem but I didn’t think my local disk system was too bad.

]]> By: Ahmed http://www.vnotion.com/?p=38&cpage=1#comment-1853 Ahmed Thu, 15 Oct 2009 16:22:04 +0000 http://www.vnotion.com/?p=38#comment-1853 Im using VCB + Backup Exec 12.5 You can safetly say that I lost 50% of my speed when backing up with the new version of VMware ESX 4.0. :( Bummer. Want to downgrade to 3.5 :( Im using VCB + Backup Exec 12.5
You can safetly say that I lost 50% of my speed when backing up with the new version of VMware ESX 4.0.

:(
Bummer.
Want to downgrade to 3.5 :(

]]> By: Anton Gostev http://www.vnotion.com/?p=38&cpage=1#comment-1846 Anton Gostev Sun, 11 Oct 2009 17:42:10 +0000 http://www.vnotion.com/?p=38#comment-1846 VMware is working on the fix... recently I have played with test version of fix and it does improve the performance. I am not sure if this stuff is covered by NDA, so I cannot provide more information at this time unfortunately (like performance numbers with fix installed, its general availability and so on). VMware is working on the fix… recently I have played with test version of fix and it does improve the performance. I am not sure if this stuff is covered by NDA, so I cannot provide more information at this time unfortunately (like performance numbers with fix installed, its general availability and so on).

]]> By: thorsten http://www.vnotion.com/?p=38&cpage=1#comment-1805 thorsten Wed, 02 Sep 2009 19:04:49 +0000 http://www.vnotion.com/?p=38#comment-1805 this issue absolutely sucks big. any news about this? when will a fix be available ? this issue absolutely sucks big. any news about this? when will a fix be available ?

]]> By: Paul http://www.vnotion.com/?p=38&cpage=1#comment-1792 Paul Tue, 11 Aug 2009 14:14:34 +0000 http://www.vnotion.com/?p=38#comment-1792 NM... sorry, my bad... got the dates messed up. NM… sorry, my bad… got the dates messed up.

]]> By: Paul http://www.vnotion.com/?p=38&cpage=1#comment-1791 Paul Tue, 11 Aug 2009 14:13:47 +0000 http://www.vnotion.com/?p=38#comment-1791 Actually, I don't believe Veeam was the first to support ESX 4.0/vSphere... We have been using vRangerPro 4.0 for some time before the new version of Veeam was released. Actually, I don’t believe Veeam was the first to support ESX 4.0/vSphere… We have been using vRangerPro 4.0 for some time before the new version of Veeam was released.

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