[ https://issues.apache.org/jira/browse/IMPALA-5858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong resolved IMPALA-5858. ----------------------------------- Resolution: Won't Fix > Impalad misleadingly reports RAM as a rotational disk > ----------------------------------------------------- > > Key: IMPALA-5858 > URL: https://issues.apache.org/jira/browse/IMPALA-5858 > Project: IMPALA > Issue Type: Bug > Components: Backend > Affects Versions: Impala 2.8.0 > Environment: Ubuntu 16.04, Dell Optiplex 7050 > Linux xxxx-xxxx 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 > x86_64 x86_64 x86_64 GNU/Linux > Reporter: Zoram Thanga > Priority: Minor > > The informational startup log of impalad dumps a lot of information, > including a report of all "disks" found on the system. The list of disks is > obtained from /proc/partitions. For the entries in /proc/partitions, the code > reads /sys/block/<device>/queue/rotational. > I0828 18:51:42.251794 31104 init.cc:218] Cpu Info: > Model: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz > Cores: 8 > Max Possible Cores: 8 > L1 Cache: 32.00 KB (Line: 64.00 B) > L2 Cache: 256.00 KB (Line: 64.00 B) > L3 Cache: 8.00 MB (Line: 64.00 B) > Hardware Supports: > ssse3 > sse4_1 > sse4_2 > popcnt > avx > avx2 > Numa Nodes: 1 > Numa Nodes of Cores: 0->0 | 1->0 | 2->0 | 3->0 | 4->0 | 5->0 | 6->0 | 7->0 | > I0828 18:51:42.251799 31104 init.cc:219] Disk Info: > Num disks 3: > * ram (rotational=true) > sda (rotational=true) > sr (rotational=true) > For HDDs and SSDs this makes sense. But for RAM, it does not. It does not > help that the kernel itself will flag /sys/block/ram{#}/queue/rotational as 1. > $ cat /sys/block/ram0/queue/rotational > 1 > $ > We probably should not report RAM as a disk, or special-case handling of RAM > devices/partitions that show up in /proc/partitions. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org