[gpfsug-discuss] GPFS - pagepool data protection?

[Sean S Lee]

Hi Pavel,

Most popular filesystems work that way.

Write buffering improves the performance at the expense of some risk.
Today most applications and all modern OS correctly handle "crash
consistency", meaning they can recover from uncommitted writes.

If you have data which absolutely cannot tolerate any "in-flight" data
loss, it requires significant planning and resources on multiple levels,
but as far as GPFS is concerned you could create a small file system and
data (VMDK's) or serve GPFS or cNFS (mount GPFS with "syncfs", mount NFS
with sync,no_wdelay)  to VM clients from those filesystems.
Your VM OS (VMDK) could be on a regular GPFS file system and your app data
and logs could be on a small GPFS with synchronous writes.

Regards
Sean
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