zk_kiger

hi, I am new to CH, but I have some confusion: 1. How does Keeper implement linearizable reads, sequential consistency in the code 2. Does Keeper cluster deployment depend on...

@antonio2368 > Keeper uses Raft. The basic way of achieving linearizable reads is to enable [`quorum_reads`](https://clickhouse.com/docs/en/operations/clickhouse-keeper#configuration), that way all the read operations will need a quorum to be successful (same...

@antonio2368 I'm very sorry, I'm new to clickhouse, thank you for your patience.

@antonio2368 Is there a delay in the drop table? I have deleted the table, but the Keeper still has path node? > clickhouse_client.HTTPError: Code: 500. Code: 999. Coordination::Exception: Bad version,...

@antonio2368 When I was testing KeeperMap, I ran into some problems: 1. Is there any noticeable performance difference between I request a Keeper through ClickHouseKeeperMap and request a Keeper directly...

@tavplubix I also couldn't believe it, so I re-tested and this time the QPS went up to 89 🥲 I am using clickhouse-common-static-22.8.3.13-amd64.tgz. standalone Keeper using command `clickhouse keeper -C...

system.build_options ``` VERSION_FULL ClickHouse 22.8.3.13 VERSION_DESCRIBE v22.8.3.13-stable VERSION_INTEGER 22008003 SYSTEM Linux VERSION_GITHASH 6a15b73faea4f9bb78c559fad5eec8814878f19d VERSION_REVISION 54465 VERSION_DATE BUILD_TYPE RelWithDebInfo SYSTEM_PROCESSOR x86_64 CMAKE_VERSION 3.16.3 C_COMPILER /usr/bin/clang-14 C_COMPILER_VERSION 14.0.6 CXX_COMPILER /usr/bin/clang++-14 CXX_COMPILER_VERSION 14.0.6...

> It's possible that it doesn't work well with multiple clients. ok, according to the reasons you mentioned , I re-tested the performance of Zookeeper and Keeper under a single...

@antonio2368 hi, I summarize the test results. single-machine test >single-client write: Keeper is about 2x slower than ZK multi-client write: Keeper is about 10x slower than ZK Fortunately, Keeper's read...

@jiangbiao910 did you have create `/benchmark` node in zk?