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Pavel Pereslegin resolved IGNITE-10862. --------------------------------------- Resolution: Duplicate > Introduce tool to free up space on a disc of unused memory pages > ---------------------------------------------------------------- > > Key: IGNITE-10862 > URL: https://issues.apache.org/jira/browse/IGNITE-10862 > Project: Ignite > Issue Type: Improvement > Components: persistence > Affects Versions: 2.7 > Reporter: Vyacheslav Daradur > Priority: Critical > > At the current time, Ignite is not able to release occupied disc space even > if a significant amount of data was removed from IgniteCache. It disturbs our > users because they can't use hardware effectively, also it increases TCO. > *Use-cases:* > Let's imagine that we have used IgniteCache with enabled PDS during the time: > - hardware disc space has been occupied during growing up of an amount > of data, e.g. 100Gb; > - then, we removed non-actual data, e.g 50Gb, which became useless for us; > - disc space stopped growing up with new data, but it was not > released, and still took 100Gb, instead of expected 50Gb; > Another use case: > - a user extracts data from IgniteCache to store it in separate > IgniteCache or another store; > - disc still is occupied and the user is not able to store data in the > different cache at the same cluster because of disc limitation; > *Possible solutions:* > Introduce some kind of mechanics which will be able to shrink data in > IgniteCache and to free up space on a disc of mapped free memory pages. > A solution should take into account possible concurrent reads and updates of > data and indexes to maintain consistency. > Maybe, it makes sense to implement a tool to be offline at the first step > that means concurrent operations will be prohibited. > Strongly recommended discussing design on dev-list with Ignite experts before > the start of implementation. -- This message was sent by Atlassian Jira (v8.20.7#820007)