Speaking of stripe sizes
knuffie at xs4all.nl
Tue Dec 10 12:48:01 CST 2002
At 13:31 9-12-2002 -0500, CBeck at coradiant.com wrote:
>What stripe sizes do people here use for databases with a mix of large
>(1GB+), medium (1MB+) and small (10k+) tables that write to the file system
2GB (max) extents per database and about 20GB+ all together.
>and not a raw partition?
>Which file system (Reiser vs Ext3 vs JFS vs XFS with/without LVM blah blah
Plain XFS on a scsi device with a larger journal for more metadata updates.
>Which control system? (Software RAID vs onboard vs attached vs SAN vs &c.)
Hardware raid 10 across 6 disks (10K rpm) using a PERC3/DC with 128MB
cache. Chunk size is 128KB.
Red Hat 7.1 with XFS bits (SGI XFS 1.0.1 installer) Running a XFS 1.2Pre3
kernel now. (~=2.4.18-17.7.x)
Progres 9.1C (9.1D in testing)
>Credit Card numbers? ATM PINs? (Hey, can't hurt right?)
Uhm, sorry. No can do.
>Need to make some purchasing decisions in the near future and I want to see
>what people are happy with. I expect it's all over the map but something
>unexpected might turn up.
Creating a new database (about 3.5GB) is a excellent way to kill
interactivity on the machine. The raid througput is about the 30-40MB/sec
mark. A standalone disk on a scsi controller can do this as well. It just
doesn't seem to get everything out of the hardware possible.
I am looking forward to the Perc4/DC which should arive sometime next year
>PPS ... anyone with beta experience on the blade servers is very welcome to
>chime in with their experience as well.
I think they suck, but they look cool :-)
They have their uses although you can't plug in random hardware or a lot of
disks or ...
It might just be your lucky day, if you only knew.
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