Re: [Moosefs-users] fox and bird

[Steve T. <sm...@cb...>]

On Thu, 29 Mar 2012, Steve Thompson wrote:

> I have further found that Thunderbird works well, but Firefox is so
> painfully slow (glacial) as to be unusable. For the time being, I have had
> to relocate the .mozilla directories to a non-MFS file system and replaced
> them by symbolic links.

Now I have upgraded to 1.6.25, have emptied MFS completely apart from my 
.mozilla directory. There are now four dedicated chunkservers with a total 
of 20TB of SATA RAID-5 file systems formatted with ext4, and all four are 
connected to a common HP Procurve switch using dual bonded balance-alb 
gigabit links, dedicated to MFS, with MTU=1500. The master is running on 
one of the chunkservers. "hdparm -t" gives me about 400 MB/sec.

Firefox is still so painfully slow as to be unuseable. It takes something 
like 30-45 minutes to start firefox, and several minutes to click on a 
link. With .mozilla in an NFS mounted file system from the same disks, 
firefox starts immediately, so it doesn't look like hardware.

Copying a large file into MFS gets me something like 80-85 MB/sec 
(physically twice that with goal=2) so I am at a loss to explain the 
dismal performance with firefox. I could really use some ideas, as I have 
no idea where to go next.

Steve