Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I don't run the setup that you're inquiring about, sorry. But maybe the limitations you're running into can be overcome. Have you ruled out that he bottleneck is not the replication link between the DRBD nodes ? are your nfs mounting with noatime ? atime is not very usefull on maildirs Dan Guy wrote: > Hi, > > I'm currently using DRBD with the normal primary/secondary set up > providing space for mail stores. The mail servers access these via > NFS. It looks like I'm starting to hit the limits of the system in its > current format. > > The new idea I've come up with is to have two mail servers with large > local drives in RAID5 providing the stores and using DRBD with dual > primaries to keep the data synced between the two servers. > Postfix/Dovecot is a lot faster with local drives, but I'm not sure > whether the overhead of DRBD + clustered FS would negate the increased > I/O I can get with local drives. > > Between the two current NFS servers (there's a primary DRBD partition > on each server with the secondary partition being on the other server) > I've got 260 million files or more (varying sizes, but most are > relatively small) and have a peak concurrency of about 350 users > hitting Dovecot on each mail server at the moment. > > Has anyone used DRBD with a clustered file system under similar > conditions? What FS did you use? Any other advise would be greatly > appreciated. > > Thanks > Guy > >