OpenSearch/server
Nhat Nguyen 15aa3764a4
Reduce recovery time with compress or secure transport (#36981)
Today file-chunks are sent sequentially one by one in peer-recovery. This is a
correct choice since the implementation is straightforward and recovery is
network bound in most of the time. However, if the connection is encrypted, we
might not be able to saturate the network pipe because encrypting/decrypting
are cpu bound rather than network-bound.

With this commit, a source node can send multiple (default to 2) file-chunks
without waiting for the acknowledgments from the target.

Below are the benchmark results for PMC and NYC_taxis.

- PMC (20.2 GB)

| Transport | Baseline | chunks=1 | chunks=2 | chunks=3 | chunks=4 |
| ----------| ---------| -------- | -------- | -------- | -------- |
| Plain     | 184s     | 137s     | 106s     | 105s     | 106s     |
| TLS       | 346s     | 294s     | 176s     | 153s     | 117s     |
| Compress  | 1556s    | 1407s    | 1193s    | 1183s    | 1211s    |

- NYC_Taxis (38.6GB)

| Transport | Baseline | chunks=1 | chunks=2 | chunks=3 | chunks=4 |
| ----------| ---------| ---------| ---------| ---------| -------- |
| Plain     | 321s     | 249s     | 191s     |  *       | *        |
| TLS       | 618s     | 539s     | 323s     | 290s     | 213s     |
| Compress  | 2622s    | 2421s    | 2018s    | 2029s    | n/a      |

Relates #33844
2019-01-14 15:14:46 -05:00
..
licenses Upgrade master to lucene-8.0.0-snapshot-a1c6e642aa (#37091) 2019-01-02 20:18:19 -06:00
src Reduce recovery time with compress or secure transport (#36981) 2019-01-14 15:14:46 -05:00
build.gradle Testing conventions: add support for checking base classes (#36650) 2019-01-08 13:39:03 +02:00