Hi,
NVMe SSD #2 also replaced. Both are of course “recycled ones” – that’s how data centers work (if people no longer use server and cancel rental agreement, the SSDs are recycled and reused as recovery parts – unless their smart status is bad). But lifetime is good for at least 1.5 years. Uwe ----- Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: [email protected] From: Michael McCandless <[email protected]> Sent: Saturday, August 31, 2019 2:02 PM To: Lucene/Solr dev <[email protected]> Subject: Re: NVMe - SSD shredding due to Lucene :-) SSD vendors should use our tests for QA'ing their new SSDs! Mike McCandless http://blog.mikemccandless.com On Sat, Aug 31, 2019 at 7:50 AM Uwe Schindler <[email protected] <mailto:[email protected]> > wrote: Hi, the service to replace those SSD is included in rental fee 😊 I am not sure why it writes so much, but I think Solr is more hammering our SSDs. Lucene’s test do not do too much IO. Nevertheless, the SSD survived more than 2 years. The server was installed on 2017-05-19. After some runtime I calculated the approximate lifetime and I was not bad in estimating: I said 2 years 😊 FYI, at the moment they replace disk #2 (I rebuilt the raid array before). Uwe ----- Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: [email protected] <mailto:[email protected]> From: Michael McCandless <[email protected] <mailto:[email protected]> > Sent: Saturday, August 31, 2019 1:32 PM To: Lucene/Solr dev <[email protected] <mailto:[email protected]> > Subject: Re: NVMe - SSD shredding due to Lucene :-) Nice to know :) Thanks for upgrading Uwe. I thought we randomly disable fsync in tests just to protect our precious SSDs? Mike McCandless <http://blog.mikemccandless.com> http://blog.mikemccandless.com On Sat, Aug 31, 2019 at 6:20 AM Uwe Schindler < <mailto:[email protected]> [email protected]> wrote: Hi all, I just wanted to inform you that I asked the provider of the Policeman Jenkins Server to replace the first of two NVMe SSDs, because it failed with fatal warnings due to too many writes and no more spare sectors: > root@serv1 ~ # nvme smart-log /dev/nvme0 > Smart Log for NVME device:nvme0 namespace-id:ffffffff > critical_warning : 0x1 > temperature : 76 C > available_spare : 2% > available_spare_threshold : 10% > percentage_used : 67% > data_units_read : 62,129,054 > data_units_written : 648,788,135 > host_read_commands : 6,426,997,226 > host_write_commands : 5,582,107,803 > controller_busy_time : 86,754 > power_cycles : 21 > power_on_hours : 20,252 > unsafe_shutdowns : 16 > media_errors : 0 > num_err_log_entries : 0 > Warning Temperature Time : 7855 > Critical Composite Temperature Time : 0 > Temperature Sensor 1 : 76 C > Thermal Management T1 Trans Count : 0 > Thermal Management T2 Trans Count : 0 > Thermal Management T1 Total Time : 0 > Thermal Management T2 Total Time : 0 The second one looks a bit better, but will be changed later, too. I have no idea what a data unit is (512 bytes, 2048 bytes,... - I think one LBA). So we are really shredding SSDs with Lucene tests 😊 Uwe P.S.: The replacement is currently going on... ----- Uwe Schindler Achterdiek 19, D-28357 Bremen <https://www.thetaphi.de> https://www.thetaphi.de eMail: <mailto:[email protected]> [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: <mailto:[email protected]> [email protected] For additional commands, e-mail: <mailto:[email protected]> [email protected]
