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Bug 1637939 - [RFE] We need additional aligments for a 4k block devices
Summary: [RFE] We need additional aligments for a 4k block devices
Keywords:
Status: CLOSED DUPLICATE of bug 1690511
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: sanlock
Version: 7.7
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: rc
: 7.7
Assignee: David Teigland
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-10-10 11:18 UTC by Denis Chaplygin
Modified: 2019-11-11 23:28 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2019-04-05 19:41:47 UTC
Target Upstream Version:
Embargoed:

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Description Denis Chaplygin 2018-10-10 11:18:43 UTC 
Description of problem: Existing 4k alignment uses 8MB for a lease, makeing it 8 times bigger compared to 512b aligment. 

This will heavilly increase size of sanlock based locks files in oVirt (up to tenth of gigabytes)

To decrease impact of that it would be great to have smaller aligments for a 4k block, like those:

 - ALIGN1M | SECTOR512: max_hosts 2000 (already implemented)
 - ALIGN1M | SECTOR4K:  max_hosts 250
 - ALIGN2M | SECTOR4K:  max_hosts 500
 - ALIGN4M | SECTOR4K:  max_hosts 1000
 - ALIGN8M | SECTOR4K:  max_hosts 2000 (already implemented)
Comment 14 David Teigland 2019-04-01 15:28:45 UTC 
Configurable sector/lease sizes have been available for quite a long time.

Also see bug 1690511 "rebase sanlock package in 7.7".
Comment 16 Jonathan Earl Brassow 2019-04-01 19:31:24 UTC 
This feature is not in RHEL7.6, but its inclusion is already accounted for in bug 1690511.

closing this bug as a duplicate.

*** This bug has been marked as a duplicate of bug 1690511 ***
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