SSD's page size is usually hundreds of KBs. IMHO f2fs will be good choice.
07.02.2016 17:24, Sven Kirmess пишет: > My current netfilter firewall produces about 80'000 lines of log per day. > The most common line length is between 192 and 297 chars > > The Kingston SSD reports 512 byte logical and physical sector size to > smartctl. > >> === START OF INFORMATION SECTION === >> Device Model: KINGSTON SMS200S330G >> Serial Number: 50026B725C02AB1E >> LU WWN Device Id: 5 0026b7 25c02ab1e >> Firmware Version: 605ABBF2 >> User Capacity: 30,016,659,456 bytes [30.0 GB] >> Sector Size: 512 bytes logical/physical >> Device is: Not in smartctl database [for details use: -P showall] >> ATA Version is: 8 >> ATA Standard is: ACS-2 revision 3 >> Local Time is: Sun Feb 7 14:51:36 2016 UTC >> SMART support is: Available - device has SMART capability. >> SMART support is: Enabled > With "smartctl -l devstat /dev/sda" I can view the "Logical Sectors > Written". After appending a 193 byte string to a file on the SSD I should > be able to see the write amplification caused by the file system. > > This is what I found: > ext2 - 16 sectores per write > ext4 - 40 sectors per write > f2fs - 32 sectors per write > vfat - 2-3 sectors per write > > It makes sense that ext4 uses more writes because of the journal. f2fs uses > more writes then ext2, although f2fs was designed to work well with flash > media. And it looks like vfat/fat32 would be the best file system for an > SSD because it has the lowest write amplification. > > The SSD allows for 90 GB writes per day for 3 years, according to its > warranty. > > That would be 188743680 sectors per day (90*1024*1024*1024/512). With ext4 > that would be 4'718'592 lines of log per day, with vfat more then 60 > million lines of log. (ulog does not sync after every write, multiple lines > might end up in one write to flash media.) > > Which file system would you choose? Is there any reason not to use fat32? > (It looks like fstrim doesn't work on vfat/fat32 but I don't know how > important fstrim is for longevity.) > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > > > ------------------------------------------------------------------------ > leaf-user mailing list: leaf-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/leaf-user > Support Request -- http://leaf-project.org/ ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 ------------------------------------------------------------------------ leaf-user mailing list: leaf-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/leaf-user Support Request -- http://leaf-project.org/
