从 SSDB 1.6.7 版本开始, 增加了 Key 过期功能, 可以支持 Key 到期自动删除, 这样, SSDB 就可以作为一个持久化的缓存服务来使用. 该功能和 Redis 的 ttl/expire 一样, 使用方法是: $ssdb-setx('key', 'value', 60); 这段代码表示, 设置 key=value, 同时到 60
从 SSDB 1.6.7 版本开始, 增加了 Key 过期功能, 可以支持 Key 到期自动删除, 这样, SSDB 就可以作为一个持久化的缓存服务来使用. 该功能和 Redis 的 ttl/expire 一样, 使用方法是:
$ssdb->setx('key', 'value', 60);
这段代码表示, 设置 key=value, 同时到 60 秒后, 自动删除 key. 需要注意的是, TTL 只支持 KV 数据结构, hash(map) 和 zset 不支持.
下载 SSDB NoSQL 数据库源码: https://github.com/ideawu/ssdb
Related posts:
- SSDB 1.6.6 稳定版发布, 支持 hclear/zclear
- 单实例支撑每天上亿个请求的SSDB
- SSDB 采用里程碑式版本发布机制
- SSDB 支持 Snappy 压缩了
你现在看的文章是: SSDB 支持 TTL 过期机制
Linode VPS - 美国虚拟主机 | IT牛人博客聚合网站

MySQLBLOBshavelimits:TINYBLOB(255bytes),BLOB(65,535bytes),MEDIUMBLOB(16,777,215bytes),andLONGBLOB(4,294,967,295bytes).TouseBLOBseffectively:1)ConsiderperformanceimpactsandstorelargeBLOBsexternally;2)Managebackupsandreplicationcarefully;3)Usepathsinst

The best tools and technologies for automating the creation of users in MySQL include: 1. MySQLWorkbench, suitable for small to medium-sized environments, easy to use but high resource consumption; 2. Ansible, suitable for multi-server environments, simple but steep learning curve; 3. Custom Python scripts, flexible but need to ensure script security; 4. Puppet and Chef, suitable for large-scale environments, complex but scalable. Scale, learning curve and integration needs should be considered when choosing.

Yes,youcansearchinsideaBLOBinMySQLusingspecifictechniques.1)ConverttheBLOBtoaUTF-8stringwithCONVERTfunctionandsearchusingLIKE.2)ForcompressedBLOBs,useUNCOMPRESSbeforeconversion.3)Considerperformanceimpactsanddataencoding.4)Forcomplexdata,externalproc

MySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,idealforconsistentlengthdatalikecountrycodes;2)VARCHARforvariable-lengthstrings,suitableforfieldslikenames;3)TEXTtypesforlargertext,goodforblogpostsbutcanimpactperformance;4)BINARYandVARB

TomasterMySQLBLOBs,followthesesteps:1)ChoosetheappropriateBLOBtype(TINYBLOB,BLOB,MEDIUMBLOB,LONGBLOB)basedondatasize.2)InsertdatausingLOAD_FILEforefficiency.3)Storefilereferencesinsteadoffilestoimproveperformance.4)UseDUMPFILEtoretrieveandsaveBLOBsco

BlobdatatypesinmysqlareusedforvoringLargebinarydatalikeImagesoraudio.1) Useblobtypes (tinyblobtolongblob) Basedondatasizeneeds. 2) Storeblobsin Perplate Petooptimize Performance.3) ConsidersxterNal Storage Forel Blob Romana DatabasesizerIndimprovebackupupe

ToadduserstoMySQLfromthecommandline,loginasroot,thenuseCREATEUSER'username'@'host'IDENTIFIEDBY'password';tocreateanewuser.GrantpermissionswithGRANTALLPRIVILEGESONdatabase.*TO'username'@'host';anduseFLUSHPRIVILEGES;toapplychanges.Alwaysusestrongpasswo

MySQLofferseightstringdatatypes:CHAR,VARCHAR,BINARY,VARBINARY,BLOB,TEXT,ENUM,andSET.1)CHARisfixed-length,idealforconsistentdatalikecountrycodes.2)VARCHARisvariable-length,efficientforvaryingdatalikenames.3)BINARYandVARBINARYstorebinarydata,similartoC


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Dreamweaver Mac version
Visual web development tools

Dreamweaver CS6
Visual web development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
