Matthew Jacobs has posted comments on this change.

Change subject: IMPALA-5240: Allow config of number of disk I/O threads per 
disk type
......................................................................


Patch Set 1:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/7232/1/be/src/runtime/disk-io-mgr.h
File be/src/runtime/disk-io-mgr.h:

PS1, Line 637:   ///  - threads_per_rotational_disk: number of read threads to 
create per rotational
             :   ///    disk. This is also the max queue depth.
             :   ///  - threads_per_flash_disk: number of read threads to 
create per flash disk. This is
             :   ///    also the max queue depth.
             :   DiskIoMgr(int num_disks, int threads_per_disk, int 
min_buffer_size,
             :       int max_buffer_size, int threads_per_rotational_disk = 0,
             :       int threads_per_flash_disk = 0)
> I think the best thing would be to remove them because I don't think we hav
You can remove threads_per_disk and instead change the tests to pass the same 
test value to both threads_per_rotational_disk and threads_per_flash_disk. Then 
you'll exercise the new code paths and get the same behavior that the tests had 
previously, so it shouldn't change.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I094aff3747104104fe0465d73dcdbef5d9892f7c
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Bikramjeet Vig <[email protected]>
Gerrit-Reviewer: Bikramjeet Vig <[email protected]>
Gerrit-Reviewer: Matthew Jacobs <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: Yes

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