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Posted to issues@ignite.apache.org by "Kirill Tkalenko (Jira)" <ji...@apache.org> on 2022/06/29 09:39:00 UTC

[jira] [Created] (IGNITE-17267) Preparing a checkpoint for a DeltaFilePageStore

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[Kirill
Tkalenko](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ktkalenko%40gridgain.com)
**created** an issue  
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|  [Ignite](https://issues.apache.org/jira/browse/IGNITE) /
[![Improvement](cid:jira-generated-image-
avatar-0358d8aa-6f10-4f3b-8ec1-f9747478521c)](https://issues.apache.org/jira/browse/IGNITE-17267)
[IGNITE-17267](https://issues.apache.org/jira/browse/IGNITE-17267)  
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[Preparing a checkpoint for a
DeltaFilePageStore](https://issues.apache.org/jira/browse/IGNITE-17267)  
| Issue Type: |  ![Improvement](cid:jira-generated-image-
avatar-0358d8aa-6f10-4f3b-8ec1-f9747478521c) Improvement  
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Assignee: |  [Kirill
Tkalenko](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ktkalenko%40gridgain.com)  
Created: |  29/Jun/22 09:38  
Fix Versions: |  3.0.0-alpha6  
Labels: |  ignite-3  
Priority: |  ![Major](cid:jira-generated-image-static-
major-89680cbd-22fa-49be-b4e6-e1300893038d) Major  
Reporter: |  [Kirill
Tkalenko](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ktkalenko%40gridgain.com)  
|

To implement the **DeltaFilePageStore** , we need to prepare a checkpoint for
their creation.

What should be done:

  1. Sort dirty pages ( **FullPageId** ) by **groupId** , **partitionId** , **pageIdx** ;
  2. In several threads, write dirty pages in batches for each partition and know the number of these pages.

What can we look at:

  * **org.apache.ignite.internal.pagememory.persistence.checkpoint.CheckpointWorkflow#beginCheckpoint**
  * **org.apache.ignite.internal.pagememory.persistence.checkpoint.CheckpointWorkflow#splitAndSortCheckpointPagesIfNeeded**
  * **org.apache.ignite.internal.pagememory.persistence.checkpoint.Checkpointer#writePages**

  
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