前面有簡單學習過redis，此處擴充套件之.. 阿里雲redis開發規範

redis工具

資料同步：redis-port

big-key搜尋

參考：工具彙總

命令列

redis-cli --bigkeys

find_bigkeys.py

阿里雲基於python工具，按key值長度

python find_bigkey.py host port password

rdb_bigkeys

基於go實現的分析rdb檔案查詢big-key工具

big-key刪除

//1、Hash刪除: hscan + hdel
public void delBigHash(String host, int port, String password, String bigHashKey) {
    Jedis jedis = new Jedis(host, port);
    if (!StringUtils.isBlank(password)) { jedis.auth(password); }
    ScanParams scanParams = new ScanParams().count(100);
    String cursor = "0";
    do {
        ScanResult<Entry<String, String>> scanResult = jedis.hscan(bigHashKey, cursor, scanParams);
        List<Entry<String, String>> entryList = scanResult.getResult();
        if (entryList != null && !entryList.isEmpty()) {
            for (Entry<String, String> entry : entryList) { jedis.hdel(bigHashKey, entry.getKey()); }
        }
        cursor = scanResult.getStringCursor();
    } while (!"0".equals(cursor));

    jedis.del(bigHashKey); //刪除bigkey
}
//2、List刪除: ltrim
public void delBigList(String host, int port, String password, String bigListKey) {
    Jedis jedis = new Jedis(host, port);
    if (!StringUtils.isBlank(password)) { jedis.auth(password); }
    long llen = jedis.llen(bigListKey);
    int counter = 0, left = 100;
    while (counter < llen) {
        jedis.ltrim(bigListKey, left, llen); //每次從左側截掉100個
        counter += left;
    }
    jedis.del(bigListKey); //最終刪除key
}
//3、Set刪除: sscan + srem
public void delBigSet(String host, int port, String password, String bigSetKey) {
    Jedis jedis = new Jedis(host, port);
    if (!StringUtils.isBlank(password)) { jedis.auth(password); }
    ScanParams scanParams = new ScanParams().count(100);
    String cursor = "0";
    do {
        ScanResult<String> scanResult = jedis.sscan(bigSetKey, cursor, scanParams);
        List<String> memberList = scanResult.getResult();
        if (memberList != null && !memberList.isEmpty()) {
            for (String member : memberList) { jedis.srem(bigSetKey, member); }
        }
        cursor = scanResult.getStringCursor();
    } while (!"0".equals(cursor));

    jedis.del(bigSetKey);//刪除bigkey
}
//4、SortedSet刪除: zscan + zrem
public void delBigZset(String host, int port, String password, String bigZsetKey) {
    Jedis jedis = new Jedis(host, port);
    if (!StringUtils.isBlank(password)) { jedis.auth(password); }
    ScanParams scanParams = new ScanParams().count(100);
    String cursor = "0";
    do {
        ScanResult<Tuple> scanResult = jedis.zscan(bigZsetKey, cursor, scanParams);
        List<Tuple> tupleList = scanResult.getResult();
        if (tupleList != null && !tupleList.isEmpty()) {
            for (Tuple tuple : tupleList) { jedis.zrem(bigZsetKey, tuple.getElement()); }
        }
        cursor = scanResult.getStringCursor();
    } while (!"0".equals(cursor));
 
    jedis.del(bigZsetKey); //刪除bigkey
}
 

熱點key搜尋

命令列

redis-cli --hotkeys

monitor

redis-faina