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