Em 19/4/2012 16:28, Carlos H. Cantu escreveu: > LC> It is a little amazing at time when some things work fast on one machine > and a > LC> lot slower on another, but the sort of problem you are seeing I would > check that > LC> there is not a problem with the hard disc. I've seen that sort of > effect when > LC> the controller is having trouble reading a disk. It WILL read the data > LC> eventually, but keeps winding the heads back to '0' and repositioning > for each > LC> block read. Replacing the hard disk and restoring the data invariably > cleared > LC> the problem. Had it a couple of time now - 'Maxtor' discs have been > stripped > LC> from all my customer machines now! > > My guess is that the time differences are also related to the > configuration of the file system used in his linux server (ie: barrier > and other params). Kouzmenko and me tested in Windows machines. > > Carlos > Firebird Performance in Detail - http://videos.firebirddevelopersday.com > www.firebirdnews.org - www.FireBase.com.br >
I am still doing some tests to try to identify the culprit. I tested on another linux machine and the restore is under 3s, but I can't compare because this machine uses SCSI disks on RAID, and mine is a simple (and pretty old) SATA disc. I will test on some real hardware and report back. I had ruled out hardware/file system too fast, thats the reason I posted the original message, the reason I ruled out hardware/file system configuration is because I noted the slowdown on a client site and then tested on my server I noted the same speed problem... But I think that both servers (mine and my customer) have something weird (perhaps filesystem options as pointed out by Carlos). Unfortunatelly I had no remote access to that server. Thanks for all the input and to Carlos and Dmitry for the time to perform the tests. see you !
