Just a guess, but possibly the DRBD syncer speed is too low? I forget the syntax, but it's in the manual... it can be set in drbd.conf or on the command line... or maybe you're using a different sync method now than before (async -> sync)? Those are the first two things that come to my mind.
Jake On Wed, Sep 30, 2009 at 7:23 PM, Dam Thanh Tung <[email protected]> wrote: > Problems followed by problems, sorry if i am about to be a spammer in this > mailing list :) > > I'm currently using drbd as a raid 1 network devices solution for my lustre > storage system. It worked well during 3 months but now, when i have to > reformat our devices, re-synchronize drbd devices ( it took about 2 days > with 6TB raid-5 partition ). After formatting them with lustre format ( > using mkfs.lustre ) , i start to copy data to my drbd devices, but: > > - Its I/O wait when i monitor by top or iostat is too hight, about 25% > > - The copy speed from my web client to our OST using drbd devices is too > low, only about 13MB/s although client and ost in is the same 1Gb Ethernet > LAN. > > > When i tried using one OST without drbd, it worked quite well > > So, could any one please tell me where the problem is ? In our drbd devices > or because of lustre ? Is there anyone has the same problem with me ? :( > > > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > > _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
