vanzin commented on a change in pull request #23278: [SPARK-24920][Core] Allow
sharing Netty's memory pool allocators
URL: https://github.com/apache/spark/pull/23278#discussion_r244827174
##########
File path:
common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java
##########
@@ -265,6 +265,16 @@ public boolean saslServerAlwaysEncrypt() {
return conf.getBoolean("spark.network.sasl.serverAlwaysEncrypt", false);
}
+ /**
+ * Flag indicating whether to share the pooled ByteBuf allocators between
the different Netty
+ * channels. If enabled then only two pooled ByteBuf allocators are created:
one where caching
+ * is allowed (for transport servers) and one where not (for transport
clients).
+ * When disabled a new allocator is created for each transport servers and
clients.
+ */
+ public Boolean sharedByteBufAllocators() {
+ return conf.getBoolean("spark.network.sharedByteBufAllocators.enabled",
true);
Review comment:
I think it's good to keep the option to disable this, just in case. We don't
need to necessarily document it, but leave it there as an escape hatch if
something unexpected shows up.
+1 on sharing the direct buf config, though.
Also, this method should return `boolean`.
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