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1. On each target, before scanning the container shard for rebuild, the logic will wait its global stable epoch (per container based) to exceed rebuild epoch. It will guarantee that all the inflight IO result that are triggered before rebuild start is visible to the subsequent rebuild logic whether on DTX leader or not. 2. Before handling some modification on DTX leader, need to check whether the epoch for current modification is newer than pool's rebuild epoch or not. If not, then return -DER_UPDATE_AGAIN to the client that will retry the modification sometime later. 3. If the modification is in rebuilding/reintegrating, then related modification will use synchronous DTX to refresh related global stable epoch more quickly. Signed-off-by: Fan Yong <fan.yong@hpe.com> Co-authored-by: Xuezhao Liu <xuezhao.liu@hpe.com> Co-authored-by: Wang Shilong <shilong.wang@hpe.com>
Add server side environment variable DAOS_REBUILD_CONTINUE_ON_TIMEOUT to control whether continue rebuild process or not if got timeout when wait for global stable epoch. It is false by default and rebuild will failout (and restart) when got timeout. If explicitly set it as true, then there is risk of data lost in subsequent rebuild process if race with inflight IO. It is a temporary solution. Signed-off-by: Fan Yong <fan.yong@hpe.com>
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Ticket title is 'FIO crc mismatch detected on 4x node IB config while running HSN cable pulls test' |
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Test stage Functional Hardware Medium Verbs Provider MD on SSD completed with status FAILURE. https://jenkins-3.daos.hpc.amslabs.hpecorp.net//job/daos-stack/job/daos/view/change-requests/job/PR-19243/1/execution/node/1782/log |
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Not need it any longer. |
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Add server side environment variable DAOS_REBUILD_CONTINUE_ON_TIMEOUT to control whether continue rebuild process or not if got timeout when wait for global stable epoch. It is false by default and rebuild will failout (and restart) when got timeout. If explicitly set it as true, then there is risk of data lost in subsequent rebuild process if race with inflight IO. It is a temporary solution.
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