Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 8/14/13 11:37 AM, Brian Candler wrote: > On 14/08/2013 15:58, Christian Völker wrote: >> Hi all, >> >> I'm planning to use DRBD in a production environment. I prefer to use >> CentOS as base system. >> >> The reason to use drbd is the synchronisation, not the high >> availability. >> We'll have two locations connected through a 100Mbit line. On both >> locations users will access the data at the same time. So I know I have >> to use a cluster aware filesystem. > You mean, you are planning to use DRBD in dual-master mode?? > > Why not just have all the accesses go to one master node in one data > centre? Then you can use a regular filesystem, with something like NFS > on top, and you can still replicate to a slave. > This would be the best option, or a chunk fs might be better, still having a single master entry point is the key. > Perhaps you expecting a very read-heavy workload, and you want all > reads to take place from the nearer copy? Using DRBD + dual master + > GFS is a risky way of achieving this, and as the GFS nodes will have > to communicate to grab locks anyway, it may not have much better > latency than the simple case. I agree with this, I think you will have issues with locking. DLM, proto C and OCFS2 in the same data center is questionable with multiple writers. >> Which filesystem is recommended? GFS? ZFS (experimental?)? > Apples and oranges. GFS and OCFS2 are cluster-aware filesystems which > you may be able to use in a multi-master scenario - if you are braver > than me. ZFS is a standard filesystem which you could only use in a > single-master setup. The Linux ZFS port is also a somewhat risky > option; if you want to use ZFS I'd suggest FreeBSD (or a FreeBSD-based > appliance like FreeNAS) Agreed. > > Regards, > > Brian. > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user