On 08/10/2013 10:04 PM, Alex 'CAVE' Cernat wrote: > stiu ca nu e vineri, dar totusi o flama constructiva n-ar strica, legat de > performantele fs-urilor strict pentru spatiu de backup > deocamdata il mai las sa ruleze niste teste, o sa vad pe luni rezultatele Poate te ajuta testele de aici: http://www.phoronix.com/scan.php?page=article&item=linux_310_10fs&num=1 Caveat: testele sunt facute pe ssd .. pe un hdd e posibil lucrurile sa fie mult diferite... Nu am inteles ce inseamna "performanta de backup".. Pentru latenta de scriere a exturilor ai: ext3: commit=nrsec Sync all data and metadata every nrsec seconds. The default value is 5 seconds. Zero means default.
ext4: in plus fata de ext3: journal_async_commit Commit block can be written to disk without waiting for descriptor blocks. If enabled older kernels cannot mount the device. This will enable 'journal_checksum' internally. in functie de mediul de stocare mai ai : nodelalloc Disable delayed allocation. Blocks are allocated when data is copied from user to page cache. min_batch_time=usec This parameter sets the commit time (as described above) to be at least min_batch_time. It defaults to zero microseconds. Increasing this parameter may improve the throughput of multi-threaded, synchronous workloads on very fast disks, at the cost of increasing latency. journal_ioprio=prio The I/O priority (from 0 to 7, where 0 is the highest priorty) which should be used for I/O operations submitted by kjournald2 during a commit operation. This defaults to 3, which is a slightly higher priority than the default I/O priority. HTH, Adrian
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