Solidigm

ANaza · 07-14-2016

NVMe drive model: Intel SSD DC P3700 U.2 NVMe SSDCapacity: 764GFS: XFSOther HW:AIC SB122A-PH8 Intel NVMe DC P3700 2 on CPU 0, 6 on CPU 1128 GiB RAM (8 x 16 DDR4 2400Mhz DIMMs)2 x Intel E5-2620v3 2.4Ghz CPUs 2 x Intel DC S2510 SATA SSDs (one is used...

ANaza · 08-09-2016

HelloToday I managed to reproduce the same issue on simple SSD (Intel DC S2510 SATA) with the same behaviour. It indirectly proves my version which blames Linux Kernel.But I doubt I'll escalate this issue to Kernel community because of the reasons I ...

ANaza · 08-08-2016

Hello NC,Thanks for your reply.I'll consider asking Kernel community about it. But since I know how to avoid this effect and know that kernel actually manipulates page cache in direct mode, I think it's not longer so important.Alex

ANaza · 07-28-2016

Hello,First we skipped flushing of page cache and performed fio testing right after large file creation. And with such approach results of direct reading tests were very poor.But as I mentioned above, we found that flushing page cache after file crea...

ANaza · 07-24-2016

Hello,I can confirm that after TRIM result is still poor.Actually, after quick looking at linux kernel code, including XFS implementation, I found that even during direct reading, page cache is still involved.But such poor performance still looks wei...

ANaza · 07-20-2016

Hello,With proposed settings I received the following result:myjob: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32...fio-2.12Starting 4 processesmyjob: (groupid=0, jobs=4): err= 0: pid=23560: Wed Jul 20 07:06:08 2016 read : io...

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Critical performance drop on newly created large file

Re: Critical performance drop on newly created large file

Re: Critical performance drop on newly created large file

Re: Critical performance drop on newly created large file

Re: Critical performance drop on newly created large file

Re: Critical performance drop on newly created large file