Thanks for the answer. I?ve already tried that earlier and I?ve got 2x
performance boost as compared to glfs_creat/glfs_write/glfs_close sequence
(which gives 4x boost compared to mounted volume).
But, within my loop just glfs_h_open/glfs_h_close calls lasts 2 times longer
than glfs_h_anonymous_write alone. So I was guessing that there are some RPC
calls behind glfs_h_open/glfs_h_close calls which could be avoided.
Ivica
> On 24 Aug 2015, at 20:02, Soumya Koduri <skoduri at redhat.com>
wrote:
>
>
>
> On 08/24/2015 11:24 PM, Ivica Siladic wrote:
>> Hi,
>>
>> I'm doing a lot of small writes to distributed/replicated Gluster
volume. The performance I'm getting is not acceptable. Interestingly,
I'm getting doubled speed boost if I use libgfsapi instead of kernel volume
mount.
>>
>> My guess is that I could get significant boost if I could reduce RPC
roundtrips somehow. So, instead of open->write->close sequence I'd
like to use single write(filename, ...) call.
>>
>> Can someone point me to the relevant places in Gluster source code and
briefly explain how to acomplish that? I really need just some rough ideas.
>>
> This can be done using anonymous fd write. There are APIs exported by
libgfapi to do anonymous write (glfs_h_anonymous_write). Please refer to
'tests/basic/gfapi/anonymous_fd_read_write.c' regarding its usage.
>
> Thanks,
> Soumya
>
>> Ivica
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