Public bug reported:
When configured with LVM local storage for ephemeral partitions, Nova performs
wiping operation using `shred` before removing volume once a VM is deleted.
`shred` consumes a lot of CPU and almost all disk bandwidth (even on SSDs)
which drastically affects the performance of other VMs running on the same
Compute.
The bigger volume size is specified in a flavor the longer this operation takes
and VMs suffer.
Would be nice to be able to specify the ionice level for this operation
(like `ionice -c3` to use the Idle I/O Scheduler).
** Affects: nova
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1835201
Title:
shredding LVM volumes may affect performance of other VMs on compute
host
Status in OpenStack Compute (nova):
New
Bug description:
When configured with LVM local storage for ephemeral partitions, Nova
performs wiping operation using `shred` before removing volume once a VM is
deleted.
`shred` consumes a lot of CPU and almost all disk bandwidth (even on SSDs)
which drastically affects the performance of other VMs running on the same
Compute.
The bigger volume size is specified in a flavor the longer this operation
takes and VMs suffer.
Would be nice to be able to specify the ionice level for this
operation (like `ionice -c3` to use the Idle I/O Scheduler).
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1835201/+subscriptions
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