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  1. Cassandra
  2. CASSANDRA-10994 Move away from SEDA to TPC, stage 1
  3. CASSANDRA-5863

In process (uncompressed) page cache

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    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Normal
    • Resolution: Fixed
    • Fix Version/s: 3.6
    • Component/s: None
    • Labels:

      Description

      Currently, for every read, the CRAR reads each compressed chunk into a byte[], sends it to ICompressor, gets back another byte[] and verifies a checksum.

      This process is where the majority of time is spent in a read request.

      Before compression, we would have zero-copy of data and could respond directly from the page-cache.

      It would be useful to have some kind of Chunk cache that could speed up this process for hot data, possibly off heap.

        Attachments

          Issue Links

          breaks

          Bug - A problem which impairs or prevents the functions of the product. CASSANDRA-11960 Hints are not seekable

          • Normal -
          • Resolved
          incorporates

          Improvement - An improvement or enhancement to an existing feature or task. CASSANDRA-11452 Cache implementation using LIRS eviction for in-process page cache

          • Normal -
          • Resolved
          is depended upon by

          Improvement - An improvement or enhancement to an existing feature or task. CASSANDRA-11681 Pick a better file_cache_size_in_mb default

          • Low -
          • Open
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. CASSANDRA-8271 Remove SSTableDeletingTask

          • Low -
          • Resolved
          supercedes

          Improvement - An improvement or enhancement to an existing feature or task. CASSANDRA-6726 Recycle CompressedRandomAccessReader/RandomAccessReader buffers independently of their owners, and move them off-heap when possible

          • Low -
          • Resolved

            Activity

              People

              • Assignee:
                blambov Branimir Lambov
                Reporter:
                tjake T Jake Luciani
                Authors:
                Branimir Lambov
                Reviewers:
                Pavel Yaskevich
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                Watchers:
                26 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: