Bug 741183
| Summary: | [RFE] Write a tool to align the partition(s) in a Windows XP image to a multiple of 8 sectors | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Richard W.M. Jones <rjones> |
| Component: | libguestfs | Assignee: | Richard W.M. Jones <rjones> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 6.3 | CC: | abaron, iheim, jzheng, kwolf, leiwang, liko, mbooth, meyering, mkenneth, moli, qwan, rjones, tburke, ykaul |
| Target Milestone: | rc | Keywords: | FutureFeature, Improvement |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libguestfs-1.16.2-1.el6 | Doc Type: | Enhancement |
| Doc Text: |
Cause:
Guest has partitions which are not aligned for best performance. Until around 2008, most guests installed themselves non-optimally like this, and this applies even when installing a pre-2008 guest today.
Consequence:
The guest suffers a performance penalty, as much as 20%.
Fix:
libguestfs now provides two tools which can diagnose and fix these guests: virt-alignment-scan and (the updated) virt-resize.
Result:
Customers can use virt-alignment-scan to identify which guests may suffer from poor performance because of unaligned partitions. Furthermore they can fix these guests by using virt-resize. Customers should read the respective manual pages carefully first.
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Story Points: | --- |
| Clone Of: | 634649 | Environment: | |
| Last Closed: | 2012-06-20 06:59:51 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 634649, 719879 | ||
| Bug Blocks: | 641489, 773650, 773651, 773677, 773696 | ||
|
Description
Richard W.M. Jones
2011-09-26 07:34:52 UTC
If we do the rebase then we will get the two tools virt-alignment-scan and (updated) virt-resize in RHEL 6.3. Setting to modified on the basis that libguestfs 1.16.2 is available and contains the new tools (virt-alignment-scan and updated virt-resize).
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
New Contents:
Cause:
Guest has partitions which are not aligned for best performance. Until around 2008, most guests installed themselves non-optimally like this, and this applies even when installing a pre-2008 guest today.
Consequence:
The guest suffers a performance penalty, as much as 20%.
Fix:
libguestfs now provides two tools which can diagnose and fix these guests: virt-alignment-scan and (the updated) virt-resize.
Result:
Customers can use virt-alignment-scan to identify which guests may suffer from poor performance because of unaligned partitions. Furthermore they can fix these guests by using virt-resize. Customers should read the respective manual pages carefully first.
set to verified, according to the above result, and i didn't see any side-effect Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2012-0774.html |