redis and memcached

SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss") . Format (New Date ())); Thread.CurrentThread (). Sleep (5000); } The results are visible and expire after one minute. See Cc-redis-tow package:cached and test classesIi. comparison with memcached1. Basic parametersmemcached default port 11211 cache default Expiration Time 30 days (one term is permanent, but can not be saved after 30 days) the value stored in a key is up to 1M, and more than 1M can be s

First, Monitoring Collection basis:Similar throughput, number of cached queries, hit rate, etc.Second, The main monitoring indicator analysis, through the stats command to collect:Uptime # #memcached运行时长Curr_connections # #当前的连接数Total_connections # #曾经打开的连接总数Connection_structures # #服务器分配的连接数Cmd_get # #执行get命令总数Cmd_set # #执行set命令总数Get_hits # #get命中次数Get_misses # #get未命中次数Bytes_read # #读取字节总数Bytes_written # #写入字节总数Bytes # #服务器当前存储占用的内存 (bytes)Limit_max

://tablemiao.iteye.com/images/icon_star.png "alt=" collection Code "style=" border:0px; "/ > Cached.setcached ("Cached_test", "Hello----", long.valueof (1)); for (int i = 0; i ; i++) { Logger.info ("Get Cached data: {}, Current time: {}", cached.getcached ("Cached_test"), New SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss") . Format (new Date ())); Thread.CurrentThread (). Sleep (N); } 650) this.width=650; "Src=" http://dl2.iteye.com/upload/attachment/0114/0290/ 30ffba7a-8278-3a8f-8357

Tags: nosqlI. The introduction of NoSQLNon-relational database (MySQL, Oracle, SQL Server are relational databases)1. Features No relationship between data, arbitrary expansion Data storage is simple, can exist in memory, read and write fast You do not need to build tables, fields. Custom formats 2. ClassificationA. Key value (key-value) database :redis, memcached, RiakRedis/

Redis Learning Resources:1. Redis Learning HandbookHttp://www.cnblogs.com/stephen-liu74/archive/2012/03/14/2349815.html2. C # Connect Redis---(1) Redis Installation and configurationhttp://blog.csdn.net/zx13525079024/article/details/81247903. Introduction to using Servicestackredis link RedisHttp://www.cnblogs.com/daiz

memcached Installation and connectionStart with Docker: Docker run-p 11211:11211-d--name memcached memcachedTo connect using telnet: Telnet 10.141.4.25 11211Common Operations Store Command setSet key flags Exptime bytes [Noreply] Value instance: Set MyKey 05005relaxAddAdd key flags Exptime bytes [Noreply]value instance: Add Newkey 04009memcachedReplaceReplace key flags Exptime bytes [Noreply]value instance:

1. Redis and memcache all store data in memory, which is the memory database. But memcache can also be used to cache other things, such as films, videos and so on;2, Redis not only supports simple k/v type data, but also provides storage of data structures such as List,set,hash;3, virtual memory--redis when the physical memory is exhausted, you can swap some long

If you simply compare the difference between Redis and memcached, the external difference is:1 Redis not only supports simple k/v-type data, but also provides storage of data structures such as List,set,zset,hash.2 Redis supports backup of data, that is, Master-slave mode of data backup.3

Title, recently in design stress testing. You can answer the way that a service hangs up, or describe the principle of a service hanging off. Reply content: Title, recently in design stress testing.You can answer the way that a service hangs up, or describe the principle of a service hanging off. Let Php/memcached/redis hang off more difficult, need some hack skill, normal situation is not hanging.N

pressed, because scanning the mouse is blocked, then may never go to scan the keyboard;3. If a cycle needs to scan a lot of devices, which will lead to response time problems;So, the way is very bad. mode Two: is the event-driven modelmost of the current UI programming is an event-driven model, as many UI platforms provide the OnClick () event, which represents the mouse down event. The event-driven model is broadly thought of as follows:1. There is an event (message) queue;2. When the mouse is

Tags: many nosql issues basic Select Type Subscribe to message subscription modebelong to the same NoSQL store, online many memcached can do is that Redis can do, why basically now two kinds of fire, reason they have their own good place.memcahed internal Multi-core mode, single-row running quickly. The memcached uses Key-value storage. Cons: Cannot persist, data

1. Data structureMemccached only supports key-value typesThe Reids supports String hash list set SortedSet, which are internally represented by Reidsobject.　　2. Memory ManagementMemcached uses the slab allocation mechanism, which divides the memory into blocks of different sizes, which in turn will put data into the appropriate size blocks, effectively reducing memory fragmentation, but will cause some memory waste.Redis just encapsulates the original mallc/free operation.Redis will put all the

Redis is an open source BSD licensed Advanced Key-value Storage System (NoSQL)can be used to store strings, hash structures, linked lists, collections, and therefore commonly used to provide data structure servicesWhat's unique about Redis versus memcached:1, Redis can be used to do storage (storage), and

-stablestatpointer_size64statrusage_user 7.746822statrusage_system4.885257statcurr_connections5stattotal_connections 20STATconnection_structures6STATreserved_fds20STATcmd_get0STAT Cmd_set0statcmd_flush0statcmd_touch0statget_hits0statget_ misses0statdelete_misses0statdelete_hits0statincr_misses0stat Incr_hits0statdecr_misses0statdecr_hits0statcas_misses0statcas _hits0statcas_badval0stattouch_hits0stattouch_misses0statauth_ Cmds0statauth_errors0statbytes_read89statbytes_written4140statlimit_maxbyt