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This enables sharded DNS publishing on a per-TLD basis. Instead of a TLD-wide lock, the sharded scheme locks each update on the shard number, allowing parallel writes to DNS. We allow N (the number of shards) to be 0 or 1 for no sharding, and N > 1 for an N-way sharding scheme. Unless explicitly set, all TLDs default to a numShards of 0, so we don't have to reload all registry objects explicitly. WARNING: This will change the lock name upon deployment for the PublishDnsAction from "<TLD> Dns Updates" to "<TLD> Dns Updates shard 0". This may cause concurrency issues if the underlying DNSWriter is not parallel-write tolerant (currently all production usages are ZonemanWriter, which is parallel-tolerant, so no issues are expected). ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=187525655 |
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| .. | ||
| writer | ||
| BUILD | ||
| DnsConstants.java | ||
| DnsMetrics.java | ||
| DnsModule.java | ||
| DnsQueue.java | ||
| DnsWriterProxy.java | ||
| PublishDnsUpdatesAction.java | ||
| ReadDnsQueueAction.java | ||
| RefreshDnsAction.java | ||