lzf compression

Summary of PHP compression and archive extensions To open the PHP user manual, we can see the following library of functions for processing compressed files, Bzip2,lzf,phar,rar,zip,zlib So what are the actual application scenarios for each of these,

Zstandard(abbreviated as ZSTD) is a new lossless compression algorithm designed to provide fast compression and achieve high compression ratios. It is neither likeLZMAand theZPAQthat pursuit of the highest possible compression ratio, is not

Previously wrote an article: http://blog.csdn.net/stark_summer/article/details/47361603, that time the Linux environment Spark use snappy way compression is not good, And today my colleague Hive on Hadoop uses snappy compression method also reported

In many cases, we need to compress a large amount of data quickly, and make a balance between disk Io and CPU so thatProgramIt runs faster. Snappy is such a fast data compressionAlgorithm. For a single core i7 processor (64-Bit mode), the processing

This article from the @ where the fun technology Pesiwang classmate contribution to share, Redis Rdb file persistence of the internal implementation of the source code analysis. This article analyzes the source code based on Redis 2.4.7 stable

"Rdb vs aof two persistence modes, implementation principle" "RDB mode" fork a process, traverse hash table, and use copy on write to save the entire db dump. Save, shutdown, slave command will trigger this operation. Particle size ratio is large,

Master-slave replication configuration for redisI. Principles Redis's master-slave replication function is very powerful. One master can have multiple slave instances, and one slave can have multiple slave instances. In this way, a powerful

@cyduSource:Http://qing.weibo.com/1639780001/61bd0ea133002460.htmlHttp://qing.weibo.com/1639780001/61bd0ea1330025sq.htmlbackground:Every tweet and commentary behind is a string of endless stories, but today is mainly aboutCounting Service, the Count

About RedisRedis is a key-value storage system. Similar to memcached, it supports storing more value types, including string (string), list (linked list), set (set), Zset (SortedSet-ordered collection), and hash (hash type). These data types support

1: spark1.0.0 attribute configuration method The spark attribute provides control items for most applications and can be configured for each application separately. Spark1.0.0 provides three methods of attribute Configuration: Sparkconf Mode