On 07.05.15 09:35, Gene Heskett wrote: > Just one question: Since I know ext4 will fry the SSD eventually, what > filesystem are you using with them?
Some useful conclusions from firsthand experience are outlined here: https://wiki.archlinux.org/index.php/Solid_State_Drives#Advantages_over_HDDs It includes advice on minimising SSD writes, and fstype to use. IIUC, turning off journalling, and setting noatime, are good starters. Here's one data point I've kept for reference: http://lists.luv.asn.au/pipermail/luv-main/2014-May/006309.html (And then plumb forgot, and bought a whirlygig out of habit.) Some durability experiments: http://techreport.com/review/24841/introducing-the-ssd-endurance-experiment http://techreport.com/review/27436/the-ssd-endurance-experiment-two-freaking-petabytes I'm told that the Intel SSD dropped out at 750 TB of writes due to going into read-only mode at exactly that amount, rather than risk sudden failure or data loss later. That doesn't sound entirely like "bricking". Excerpts from some January posts on the above ML: >>> This machine has been running for over 188 days non-stop, has logged nearly 19 TB of writes, and is about 2.5% of the way through it's expected minimum lifespan[1]. Estimated total lifespan time: 20.6 years. ... Total_LBAs_Written 2066747494 (ie. about 1080 GiB [2]) This has been running for 763 days non-stop. Like the first machine, it hasn't used any of the reserved blocks yet. It's about 1.3% of the way through its min expected lifespan.[3] Estimated total lifespan time: 160 years. These people killed one after 24,000 erase cycles and 3 petabytes of writes: http://www.vojcik.net/samsung-ssd-840-endurance-destruct-test/ I'm not going to lose sleep over the durability of a good quality SSD drive with adequate wear levelling, especially if it isn't a tiny-geometry super-dense one. Erik ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
