[Lustre-discuss] External journal for OSTs

[Charland, Denis]

> On an OSS with two OSTs, is a RAID-1 set with two 400MB partitions a bad choice for the external
> journals or should each journal be located on a separate RAID-1 set with one 400MB partition?
>

Anyone can give me an advice on that?

Actually, there will be four OSTs located in two 12 2TB-disk racks ( 2 * 4+1 plus two hot spares per rack, ext4
with external journal). One RAID controller per disk rack. The server box has room for eight disks ( one RAID1
for the OS, one RAID1 for the MDT ).There are four disks available for the external journals: one RAID1 with four
400MB partitions or two RAID1 with two 400MB partitions?

Denis Charland
UNIX Systems Administrator
National Research Council Canada
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