Add support for compressions and make LZ4 default for backup 2.0 #833
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Codecov Report
@@ Coverage Diff @@
## 3.x #833 +/- ##
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+ Coverage 46.56% 47.01% +0.45%
- Complexity 1052 1063 +11
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Files 166 169 +3
Lines 7280 7393 +113
Branches 746 760 +14
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+ Hits 3390 3476 +86
- Misses 3638 3660 +22
- Partials 252 257 +5
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| * this to sometimes C* creating files which are zero bytes, and giving that in | ||
| * snapshot for some unknown reason. | ||
| */ | ||
| if (chunk.length > 0) rateLimiter.acquire(chunk.length); |
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I assume we still want to proceed with the upload of this 0 byte file to keep our s3 snapshots consistent with C* snapshot view, and hence we do not skip the rest of the upload code path even if the file has 0 byte - is this correct?
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| // Cache hit. Return the value. | ||
| if (cacheResult != null) return cacheResult; | ||
| if (lastUpdatedTimestamp != null) return true; |
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since we do not really check the value of the timestamp, what difference does this make relative to having a Boolean? Maybe I will discover its importance in other fails, if I do, will delete this comment.
| import java.time.temporal.ChronoUnit; | ||
| import javax.crypto.KeyGenerator; | ||
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| public class s3test { |
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This class has a lot of commented code. Any reason for keeping the commented code?
We have supported Snappy as the only compression type while uploading the files. We wanted to support customizable compression types and thus support for LZ4 and no compression.
In this PR we make LZ4 as the default compression type for backup 2.0
Future work: Do not compress Data.db which are already compressed.
In this PR we have encapsulated the directives on how to upload or download a file to class UploadDownloadDirectives. This includes directives like compression, encryption, retries to use etc.