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Scan all pages from specified range (metaPageId + [offset -> total])
- acquire page
- if the checkpoint is finished (after key change) and page is dirty - skip this page.if the checkpoint is not finished or page is not dirty
- lock page
- unlock page (dirty=true)
- release page
...
Reencryption status requires an additional 8 bytes on the meta page of each partition.
Index partition uses PageMetaIO to read/write meta information (page type T_META).
Each other partition uses PagePartitionMetaIO to read/write meta information (page type T_PART_META).
Partition meta starts just after the end of the page meta.
draw.io Diagram |
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border | true |
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diagramName | pagemeta_old |
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simpleViewer | false |
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width | |
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links | auto |
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tbstyle | top |
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lbox | true |
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diagramWidth | 501 |
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revision | 1 |
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To support binary compatibility and keep code clean we creating a new successor of PageMetaIO - PageMetaIOV2 with the same type T_META.
We converting all existing T_META pages into a new version.
We storing additional 8 bytes at the end of each T_META and T_PART_META memory pages store an additional 8 bytes partition meta shifted by 8 bytes.
draw.io Diagram |
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border | true |
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diagramName | PagePartMetaModV2 |
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simpleViewer | false |
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width | |
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links | auto |
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tbstyle | top |
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lbox | true |
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diagramWidth | 441 |
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revision | 5 |
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draw.io Diagram |
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border | true |
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diagramName | PageIndexMetaModV2pagemeta_new |
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simpleViewer | false |
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width | |
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links | auto |
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tbstyle | top |
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lbox | true |
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diagramWidth | 531611 |
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revision | 25 |
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WAL delta records have also been modified to store re-encryption status.
...
- Background re-encryption may affect performance. Performance impact can be managed using the following configuration options:
- reencryptionThreadCnt - number of threads used for re-encryption.
- reencryptionBatchSize - number of pages that are scanned during re-encryption under checkpoint lock.
- reencryptionRateLimit - page scanning speed limit in megabytes per second.
reencryptionThreadCnt - number of threads used for re-encryption(?).
- The WAL history can be not enough to store all entries between checkpoints (this should be carefully tuned by properly setting the size of the WAL history and tuning the re-encryption performance).
- The WAL history (for delta rebalancing) may be lost for all cache groups due to background re-encryption.
Process management
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Public API changes
IgniteEncryption
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- ReencryptionPagesLeft - (long) Total pages left for reencryption.
- ReencryptionFinished - (boolean) Indicates whether reencryption re-encryption is finished or not (it will set to true only when a checkpoint is finished).
Process management
The following commands should be added to the control.sh utility:
Rotate encryption key.
Code Block |
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language | text |
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title | command syntax |
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control.(sh|bat) --encryption change_cache_key cacheGroupName --yes |
Code Block |
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language | text |
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title | command output |
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The encryption key has been changed for cache group "default". |
View encryption key identifiers.
Code Block |
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control.(sh|bat) --encryption cache_key_ids cacheGroupName |
Code Block |
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language | text |
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title | command output |
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Encryption key identifiers for cache: default
Node 6085d500-2736-4c1f-b47c-444cf0a00000:
1 (active)
0
Node d98654c0-6dfb-4996-993e-387156300001:
1 (active)
0 |
View cache group re-encryption status.
Code Block |
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language | text |
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title | command syntax |
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control.(sh|bat) --encryption reencryption_status cacheGroupName |
Code Block |
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language | text |
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title | command output |
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Node 4ed26231-f92d-4b1c-86ba-7a117c200001:
1552 KB of data left for re-encryption
Node 89a456e5-59c5-4f13-a75b-39ab25000000:
1552 KB of data left for re-encryption |
Suspend cache group re-encryption.
Code Block |
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language | text |
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title | command syntax |
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control.(sh|bat) --encryption suspend_reencryption cacheGroupName |
Code Block |
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language | text |
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title | command output |
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Node ad1328e7-11e0-4ecb-8ef2-066519e00001:
re-encryption of the cache group "default" has been suspended.
Node 2a9e291f-e2d1-46e3-9954-18deb0e00000:
re-encryption of the cache group "default" has been suspended. |
Resume cache group re-encryption.
Code Block |
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language | text |
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title | command syntax |
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control.(sh|bat) --encryption resume_reencryption cacheGroupName |
Code Block |
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language | text |
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title | command output |
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Node 2ed43509-caab-48dc-a27d-3be65d800000:
re-encryption of the cache group "default" has been resumed.
Node b52d6451-a948-48d5-b79a-411956700001:
re-encryption of the cache group "default" has been resumed. |
View/change re-encryption rate limit.
Code Block |
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language | text |
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title | command syntax |
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control.(sh|bat) --encryption reencryption_rate [limit]
Parameters:
limit - decimal value to change rate limit (MB/s) |
Code Block |
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language | text |
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title | command output |
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Node 15cb8485-0c09-4361-b267-107d38400000:
re-encryption rate has been limited to 0.01 MB/s.
Node 909ed414-22e6-477b-b2ca-d1934cd00001:
re-encryption rate has been limited to 0.01 MB/s. |
Reference Links
- PCI DSS Requirements and Security Assessment Procedures
https://www.pcisecuritystandards.org/documents/PCI_DSS_v3-2-1.pdf - How Often Do I Need to Rotate Encryption Keys on My SQL Server?
https://info.townsendsecurity.com/bid/49019/How-Often-Do-I-Need-to-Rotate-Encryption-Keys-on-My-SQL-Server - PCI DSS and key rotations simplified
https://www.crypteron.com/blog/pci-dss-key-rotations-simplified/ - Transparent Data Encryption in MS SQL Server
https://docs.microsoft.com/en-us/sql/relational-databases/security/encryption/transparent-data-encryption?view=sql-server-ver15 - Oracle Transparent Data Encryption FAQ
https://www.oracle.com/database/technologies/faq-tde.html - InnoDB Data-at-Rest Encryption
https://dev.mysql.com/doc/refman/8.0/en/innodb-data-encryption.html - Transparent data encryption feature proposed in pgsql-hackers.
https://wiki.postgresql.org/wiki/Transparent_Data_Encryption#Key_Rotation
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Jira |
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server | ASF JIRA |
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columns | key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution |
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maximumIssues | 20 |
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jqlQuery | project = Ignite AND labels in (tde-phase-3) ORDER BY status |
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serverId | 5aa69414-a9e9-3523-82ec-879b028fb15b | key | IGNITE-12843 |
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|