監(jiān)視器

監(jiān)視器

通過(guò)執(zhí)行?MONITOR?命令， 客戶(hù)端可以將自己變?yōu)橐粋€(gè)監(jiān)視器， 實(shí)時(shí)地接收并打印出服務(wù)器當(dāng)前處理的命令請(qǐng)求的相關(guān)信息：

redis> MONITOR
OK
1378822099.421623 [0 127.0.0.1:56604] "PING"
1378822105.089572 [0 127.0.0.1:56604] "SET" "msg" "hello world"
1378822109.036925 [0 127.0.0.1:56604] "SET" "number" "123"
1378822140.649496 [0 127.0.0.1:56604] "SADD" "fruits" "Apple" "Banana" "Cherry"
1378822154.117160 [0 127.0.0.1:56604] "EXPIRE" "msg" "10086"
1378822257.329412 [0 127.0.0.1:56604] "KEYS" "*"
1378822258.690131 [0 127.0.0.1:56604] "DBSIZE"

每當(dāng)一個(gè)客戶(hù)端向服務(wù)器發(fā)送一條命令請(qǐng)求時(shí)， 服務(wù)器除了會(huì)處理這條命令請(qǐng)求之外， 還會(huì)將關(guān)于這條命令請(qǐng)求的信息發(fā)送給所有監(jiān)視器， 如圖 24-1 所示。