[SSSD] [PATCH 1/1] tests: Don't assume absolute test dir in test_io.c

Nikolai Kondrashov Nikolai.Kondrashov at redhat.com
Mon May 19 17:36:56 UTC 2014


On 05/19/2014 08:28 PM, Jakub Hrozek wrote:
> On Mon, May 19, 2014 at 05:55:45PM +0300, Nikolai Kondrashov wrote:
>>> "ramdisk" is 58x faster then HDD.
>>> "ramdisk" is 26x faster then HDD.
>>
>> Out of curiosity: why is it so much faster? Does the code sync to disc often?
>
> Every sysdb_transaction_commit or ldb_transaction_commit if we rely on
> ldb's autotransaction is several fsyncs (4 I think). That's the reason
> we try to collect all the data first in the daemon and write larger
> chunks of data in a single transaction.

Ah, as I suspected, thanks!
I should have probably just run the tests under strace, instead of asking.

Sincerely,
Nick



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