tree 8d3a052195d7652ecc1e4ba012a9f703f1c1c1b9
parent 0a082174c5717018971a9b2462306ca26494d6d0
author Fang-Yu Rao <fangyu.rao@cloudera.com> 1560010017 -0700
committer Impala Public Jenkins <impala-public-jenkins@cloudera.com> 1573264491 +0000

IMPALA-7984: Port runtime filter from Thrift RPC to KRPC

Previously the aggregation and propagation of a runtime filter in Impala is
implemented using Thrift RPC, which suffers from a disadvantage that the number
of connections in a cluster grows with both the number of queries and cluster
size. This patch ports the functions that implement the aggregation and
propagation of a runtime filter, i.e., UpdateFilter() and PublishFilter(),
respctively, to KRPC, which requires only one connection per direction between
every pair of hosts, thus reducing the number of connections in a cluster.

In addition, this patch also incorporates KRPC sidecar when the runtime filter
is a Bloom filter. KRPC sidecar eliminates the need for an extra copy of the
Bloom filter contents when a Bloom filter is serialized to be transmitted and
hence reduces the serialization overhead. Due to the incorporation of KRPC
sidecar, a SpinLock is also added to prevent a BloomFilter from being
deallocated before its associated KRPC call finishes.

Two related BE tests bloom-filter-test.cc and bloom-filter-benchmark.cc are
also modified accordingly because of the changes to the signatures of some
functions in BloomFilter.

Testing:
This patch has passed the exhaustive tests.

Change-Id: I6b394796d250286510e157ae326882bfc01d387a
Reviewed-on: http://gerrit.cloudera.org:8080/13882
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>