Release Notes

Dell PowerEdge R730xd Performance and Sizing Guide for Red Hat Ceph Storage - A Dell Red Hat Technical White Paper 28
 rados_seq_suite_<1..10>_clients.yml
o librados-level benchmark on a replicated pool, replication factor 3
In each benchmark, these files are called with CBT in a loop.
CAUTION
When executing multiple instances of CBT subsequently in a loop, as in this benchmark, it is
important to note that CBT will delete any existing pool with the same name. This is an
asynchronous process that triggers purging object structures on the backend file store. While the
command ‘ceph osd pool delete’ returns, instantly a potential long-running IO-intensive process
on the backend is started which may collide with IO issued by a subsequent benchmark run.
It is crucial to either wait for this process to finish before starting a new benchmark, or omit the
pool deletion to avoid skewed benchmark results.
In this benchmark, CBT has been modified to implement a new parameter that will cause CBT to
skip deletion of existing pools at the beginning of a new benchmark.