Bug 1475780 - [RFE][scale] - Set "blkdiscard" as the default zero method
[RFE][scale] - Set "blkdiscard" as the default zero method
Status: NEW
Product: vdsm
Classification: oVirt
Component: RFEs (Show other bugs)
Unspecified Unspecified
low Severity medium (vote)
: ovirt-4.2.1
: ---
Assigned To: Idan Shaby
Raz Tamir
: FutureFeature, Performance
Depends On: 1367806 1327886
Blocks: wipe_disk_using_blkdiscard 1314382
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Reported: 2017-07-27 06:40 EDT by Idan Shaby
Modified: 2017-12-06 07:51 EST (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: 1367806
Last Closed:
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: Storage
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
rule-engine: ovirt‑4.2?
ratamir: testing_plan_complete-
rule-engine: planning_ack?
rule-engine: devel_ack?
rule-engine: testing_ack?

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Comment 1 Yaniv Kaul 2017-07-30 04:49:07 EDT
I think this is 'blkdiscard --zero' option here.
When we support just 'blkdiscard' (if the storage promises to return zeros on discarded blocks), it's a different option, no?
Comment 2 Idan Shaby 2017-07-30 05:09:09 EDT
Yes, but since we're talking about the config value "zero_method" (see Bug 1367806), the option name is "blkdiscard".

I will open a new BZ to track the second RFE you implied to, i.e when the user removes a disk with an intention to zero and discard it, and the underlying storage support discard_zeroes_data, then the disk is only discarded (and not wiped).
Comment 3 Allon Mureinik 2017-09-14 11:34:52 EDT
This depends on the scale's team ability to prove this method is safe.

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