THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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This strategy requires changing the format of the encryption page to store the identifier (number) of the encryption key. Each encrypted page has a space reserved for a page crc (4 bytes) that has an encryption block size (minimum 8 bytes).
Comparison
| copy | in place | |
|---|---|---|
| The amount of disk input-output | 2x | 2x+ (depends on WAL settings) |
| The amount of required disk space | 2x | limited by WAL settings |
Performance(rough estimate) | faster | slower |
Implementation complexity (rough estimate) | ||
| Stable topology, read-only | simple | simple |
| Online updates | complex | simple |
| Unstable topology | complex | simple |
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