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Philip Zeyliger commented on IMPALA-8188: ----------------------------------------- https://unix.stackexchange.com/posts/308724/revisions seems to point to following {{/sys/class/block/nvme0n1p1}} (or similar) to look at this. It's all messy. > Some SSDs are not properly detected as non-rotational > ----------------------------------------------------- > > Key: IMPALA-8188 > URL: https://issues.apache.org/jira/browse/IMPALA-8188 > Project: IMPALA > Issue Type: Bug > Components: Backend > Affects Versions: Impala 3.2.0 > Reporter: Joe McDonnell > Priority: Critical > > Here is an example Impala log: > > {noformat} > I0211 10:50:40.650727 18344 init.cc:288] Disk Info: > Num disks 2: > nvme0n (rotational=true) > nvme0n1p (rotational=true){noformat} > I logged into an equivalent machine, and the OS sees these as not rotational: > > > {noformat} > # cat /sys/block/nvme0n1/queue/rotational > 0 > {noformat} > Device names that end in a number get trimmed (i.e. /dev/sda2 becomes > /dev/sda). See > [https://github.com/apache/impala/blob/master/be/src/util/disk-info.cc#L73-L74] > These devices don't follow that pattern, so we don't find the right files. > Neither /sys/block/nvme0n nor /sys/block/nvme0n1p exist, so both fall back to > being rotational. > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org