HA using GFS2 or OCFS2

[mir]

Hi all,

Anybody having experiences with a HA setup based on GFS2 or OCFS2 instead of DRBD?

My experiences with DRBD showed me that using DRBD will severely harm your I/O and since I plan on creating a couple of database clusters I/O is the key factor to success.

Thanks in advance,
Michael

 

[clacke]

Late answer, but in case someone stumbles over this thread ...

DRBD and GFS2/OCFS2 are not alternatives to each other, they are different levels of technologies. GFS2 and OCFS2 are file systems intended to be used on shared storage. One way to achieve shared storage is to have two machines access the same drive over iSCSI, another way to achieve shared storage is to use DRBD, so in that case you would be running e.g. OCFS2 on top of DRBD.

 

[e100]

My experiences with DRBD showed me that using DRBD will severely harm your I/O and since I plan on creating a couple of database clusters I/O is the key factor to success.

I am very satisfied with the performance of DRBD when running database loads.
Once we upgraded to 10G Infiniband for DRBD the limiting factor on IOPS (read or write) is KVMs single IO thread not DRBD and the limiting factor on sequential write is the 10G Infiniband (900MBytes/sec) and sequential read is limited by my RAID card at 2000MBytes/sec
The used Infiniband cards were cheaper than the dual port 1gbps pcie Intel cards they replaced.