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ListObjects Metadata Caching (#10648)

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Design: https://gist.github.com/klauspost/025c09b48ed4a1293c917cecfabdf21c

Gist of improvements:

* Cross-server caching and listing will use the same data across servers and requests.
* Lists can be arbitrarily resumed at a constant speed.
* Metadata for all files scanned is stored for streaming retrieval.
* The existing bloom filters controlled by the crawler is used for validating caches.
* Concurrent requests for the same data (or parts of it) will not spawn additional walkers.
* Listing a subdirectory of an existing recursive cache will use the cache.
* All listing operations are fully streamable so the number of objects in a bucket no 
  longer dictates the amount of memory.
* Listings can be handled by any server within the cluster.
* Caches are cleaned up when out of date or superseded by a more recent one.
This commit is contained in:
Klaus Post
2020-10-28 09:18:35 -07:00
committed by GitHub
parent 51222cc664
commit a982baff27
65 changed files with 6328 additions and 742 deletions
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10
cmd/api-response.go
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@@ -35,11 +35,11 @@ import (
const (
// RFC3339 a subset of the ISO8601 timestamp format. e.g 2014-04-29T18:30:38Z
iso8601TimeFormat = "2006-01-02T15:04:05.000Z" // Reply date format with nanosecond precision.
maxObjectList = 1000 // Limit number of objects in a listObjectsResponse/listObjectsVersionsResponse.
maxDeleteList = 10000 // Limit number of objects deleted in a delete call.
maxUploadsList = 10000 // Limit number of uploads in a listUploadsResponse.
maxPartsList = 10000 // Limit number of parts in a listPartsResponse.
iso8601TimeFormat = "2006-01-02T15:04:05.000Z" // Reply date format with nanosecond precision.
maxObjectList = metacacheBlockSize - (metacacheBlockSize / 10) // Limit number of objects in a listObjectsResponse/listObjectsVersionsResponse.
maxDeleteList = 10000 // Limit number of objects deleted in a delete call.
maxUploadsList = 10000 // Limit number of uploads in a listUploadsResponse.
maxPartsList = 10000 // Limit number of parts in a listPartsResponse.
)
// LocationResponse - format for location response.