Bug 1102057
Summary: | If rdma transport is used in cluster.conf, cman is unable to start after shutdown. | ||
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Product: | Red Hat Enterprise Linux 6 | Reporter: | Jan Friesse <jfriesse> |
Component: | corosync | Assignee: | Jan Friesse <jfriesse> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | cluster-qe <cluster-qe> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 6.7 | CC: | ccaulfie, cluster-maint, fdinitto, jfriesse, jkortus, rpeterso, teigland, zheka |
Target Milestone: | rc | Keywords: | OtherQA |
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | 1001210 | Environment: | |
Last Closed: | 2015-08-11 13:49:10 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Comment 1
Jan Friesse
2014-06-02 09:12:46 UTC
Yevheniy, as 6.6 is out with all patches from https://bugzilla.redhat.com/show_bug.cgi?id=1001210, do you plan/want to make additional changes into RDMA transport in corosync? Yevheniy, any news/opinions for this BZ? Kind regards, Honza Jan, for now we are delaying our work on IB in corosync. The reason is, that despite reasonably good IB support in corosync itself, dlm still uses ipoib communication layer. While it is not a problem in single channel configurations, any redundant network configuration in corosync switches dlm to SCTP instead of TCP. SCTP drastically slows down clustered FS, making them unusable for our projects. As we cannot rely on single network channel in our clusters, the only solution for us is to use iboib bonding instead of native RDMA and corosync network redundance. On the other hand, patched RDMA in corosync seems to work flawlessly on our test systems, and if no one comes with some another bug, i see no reason to make any additional changes to IB code right now. Regards, Yevheniy. P.S. Sorry for delayed reaction RHEL 6.7 capacity constrained. Moving to 6.8. IB support in corosync seems to be good enough for reporter, so closing this bug. |