Sync Clickhouse with MySQL/MongoDB Company: Xiaoxin Tech. Industry: Education Team: Big Data Leader: wangchao@xiaoheiban.cn About 100 billion data this year till now 30 million users We use config file needed for a new Clickhouse table ● Init and keep syncing data in one app for a table ● Sync multiple data source to Clickhouse in minutes PTS Provider Transform Sinker ● Major Provider Must config file needed for a new Clickhouse table ● Init and keep syncing data in one app for a table ● Sync multiple data source to Clickhouse in minutes BONUS Time travel history state Create Update Update

Sync Clickhouse with MySQL/MongoDB Company: Xiaoxin Tech. Industry: Education Team: Big Data Leader: wangchao@xiaoheiban.cn About 100 billion data this year till now 30 million users We use config file needed for a new Clickhouse table ● Init and keep syncing data in one app for a table ● Sync multiple data source to Clickhouse in minutes PTS Provider Transform Sinker ● Major Provider Must config file needed for a new Clickhouse table ● Init and keep syncing data in one app for a table ● Sync multiple data source to Clickhouse in minutes BONUS Time travel history state Create Update Update

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Semi-Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >/vitess.git (fetch) origin git@github.com:/vitess.git (push) To help you keep your fork in sync with the main repo, add an upstream remote: $ git remote add upstream git@github.com:vitessio/vitess git@github.com:vitessio/vitess.git (fetch) upstream git@github.com:vitessio/vitess.git (push) Now to sync your local master branch, do this: $ git checkout master (master) $ git pull upstream master Note:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Semi-Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >/vitess.git (fetch) origin git@github.com:/vitess.git (push) To help you keep your fork in sync with the main repo, add an upstream remote: $ git remote add upstream git@github.com:vitessio/vitess git@github.com:vitessio/vitess.git (fetch) upstream git@github.com:vitessio/vitess.git (push) Now to sync your local main branch, do this: $ git checkout main (main) $ git pull upstream main Note: In the

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 Semi-Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >/vitess.git (fetch) origin git@github.com:/vitess.git (push) To help you keep your fork in sync with the main repo, add an upstream remote: $ git remote add upstream git@github.com:vitessio/vitess git@github.com:vitessio/vitess.git (fetch) upstream git@github.com:vitessio/vitess.git (push) Now to sync your local master branch, do this: $ git checkout master (master) $ git pull upstream master Note:

>/vitess.git (fetch) origin git@github.com:/vitess.git (push) To help you keep your fork in sync with the main repo, add an upstream remote: $ git remote add upstream git@github.com:vitessio/vitess git@github.com:vitessio/vitess.git (fetch) upstream git@github.com:vitessio/vitess.git (push) Now to sync your local main branch, do this: $ git checkout main (main) $ git pull upstream main Note: In the TabletServer will make the vitess architecture more flexible. There are many places in the code where we instantiate a QueryService. All those places can now explore the benefit of instantiating a TabletServer or

indicate that we are not hardcoding any value, but can change the value at runtime. Line 7 We instantiate a PreparedStatement, which is needed to execute the parameterized SQL. By passing the SQL string indicate that we are not hardcoding any value, but can change the value at runtime. Line 7 We instantiate a PreparedStatement, which is needed to execute the parameterized SQL. By passing the SQL string

file. wal_sync_method (string) Method used for forcing WAL updates out to disk. Possible values are fsync (call fsync() at each commit), fdatasync (call fdatasync() at each commit), open_sync (write WAL WAL files with open() option O_SYNC), and open_datasync (write WAL files with open() option O_DSYNC). Not all of these choices are available on all platforms. If fsync is off then this setting is irrelevant messages; it may trun- cate or drop messages just when you need them the most. Also, on Linux, syslog will sync each message to disk, yielding poor performance. (You can use a - at the start of the file name in

file. wal_sync_method (string) Method used for forcing WAL updates out to disk. Possible values are fsync (call fsync() at each commit), fdatasync (call fdatasync() at each commit), open_sync (write WAL WAL files with open() option O_SYNC), and open_datasync (write WAL files with open() option O_DSYNC). Not all of these choices are available on all platforms. If fsync is off then this setting is irrelevant messages; it may truncate or drop messages just when you need them the most. Also, on Linux, syslog will sync each message to disk, yielding poor performance. (You can use a - at the start of the file name in

physically written to disk, by issuing fsync() system calls or various equivalent methods (see wal_sync_method). This ensures that the database cluster can recover to a consistent state after an operating postgresql.conf file. If you turn this option off, also consider turning off full_page_writes. wal_sync_method (string) Method used for forcing WAL updates out to disk. If fsync is off then this setting write-through of any disk write cache) • fsync (call fsync() at each commit) • open_sync (write WAL files with open() option O_SYNC) Not all of these choices are available on all platforms. The default is the