[Lustre-discuss] Frequent OSS Crashes with heavy load
Brian J. Murrell
Brian.Murrell at Sun.COM
Mon Nov 10 08:21:30 PST 2008
On Mon, 2008-11-10 at 16:18 +0000, Wang lu wrote:
> I am also unclear about the top result:
> top - 00:16:19 up 1 day, 3:58, 1 user, load average: 22.71, 23.27, 23.74
> Tasks: 851 total, 2 running, 849 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.0% us, 7.0% sy, 0.0% ni, 86.7% id, 0.2% wa, 0.2% hi, 5.9% si
> Mem: 8307364k total, 894940k used, 7412424k free, 240912k buffers
> Swap: 16386292k total, 0k used, 16386292k free, 78108k cached
>
>
> The CPU and memory are both free, while the load average is quite high. It is
> possibile for Lustre to cache more data?
Caching on the OSS is a coming feature but that doesn't alleviate the
need of the OST to read data not in cache and data that needs to be
flushed to disk. IOW, a cache will not alleviate a problem of
oversubscribed storage.
b.
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