Join Percona CTO Vadim Tkachenko at the Cloud Native Utah meetup in Salt Lake City on Tuesday, May 8, 2018, for an Intro to ClickHouse. Next week, I’ll be switching from MyRocks performance testing and present an introduction to ClickHouse to the Cloud Native Utah meetup. Interestingly enough, even though it is totally different from OLTP engines, […]
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In this blog post, I’ll look at how you can analyze MySQL audit logs (Percona Server for MySQL) with ClickHouse and ClickTail. Audit logs are available with a free plugin for Percona Server for MySQL (https://www.percona.com/doc/percona-server/LATEST/management/audit_log_plugin.html). Besides providing insights about activity on your server, you might need the logs for compliance purposes. However, on an active […]
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In this blog post, I’ll look at how you can analyze raw MySQL query logs with ClickHouse. For typical query performance analyses, we have an excellent tool in Percona Monitoring and Management. You may want to go deeper, though. You might be longing for the ability to query raw MySQL “slow” query logs with SQL. […]
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In this blog post, I will talk about archiving MySQL tables in ClickHouse for storage and analytics. Why Archive? Hard drives are cheap nowadays, but storing lots of data in MySQL is not practical and can cause all sorts of performance bottlenecks. To name just a few issues: The larger the table and index, the slower […]
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In this post, we’ll look at updating and deleting rows with ClickHouse. It’s the second of two parts. In the first part of this post, we described the high-level overview of implementing incremental refresh on a ClickHouse table as an alternative support for UPDATE/DELETE. In this part, we will show you the actual steps and […]
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In this post, we’ll look at updating and deleting rows with ClickHouse. It’s the first of two parts. Update: Part 2 of this post is here. ClickHouse is fast – blazing fast! It’s quite easy to pick up, and with ProxySQL integrating with existing applications already using MySQL, it’s way less complex than using other […]
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I will be presenting at the ClickHouse MySQL Silicon Valley Meetup on Wednesday, October 25, 2017, at 6:30 PM. ClickHouse is a real-time analytical database system. Even though they’re only celebrating one year as open source software, it has already proved itself ready for the serious workloads. We will talk about ClickHouse in general, some internals […]
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In this blog, I’ll use ClickHouse and Tabix to look at a new very large dataset for research. It is hard to come across interesting datasets, especially a big one (and by big I mean one billion rows or more). Before, I’ve used on-time airline performance available from BUREAU OF TRANSPORTATION STATISTICS. Another recent example is NYC […]
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Percona Live Europe 2017 keeps providing excellent sessions with useful information on great open source database technologies. Yandex’s Clickhouse was one of these technologies that was well covered at the conference this year. There were several talks that featured Clickhouse this year. I was able to attend two of them. The first was a discussion of […]
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In this blog, I’ll look at how to use ClickHouse for parallel log processing. Percona is seen primarily for our expertise in MySQL and MongoDB (at this time), but neither is quite suitable to perform heavy analytical workloads. There is a need to analyze data sets, and a very popular task is crunching log files. Below […]
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