Ben Wen Dang Zhu Yao Jie Shao Zai Shi Ji Sheng Chan Huan Jing Zhong ,Ru He Dui Doris De Yuan Shu Ju Jin Xing Guan Li . Bao Gua FE Jie Dian Jian Yi De Bu Shu Fang Shi , Yi Xie Chang Yong De Cao Zuo Fang Fa , Yi Ji Chang Jian Cuo Wu De Jie Jue Fang Fa .

Zai Yue Du Ben Wen Dang Qian ,Qing Xian Yue Du Doris Yuan Shu Ju She Ji Wen Dang Liao Jie Doris Yuan Shu Ju De Gong Zuo Yuan Li .

• Dang Qian Yuan Shu Ju De She Ji Shi Wu Fa Xiang Hou Jian Rong De . Ji Ru Guo Xin Ban Ben You Xin Zeng De Yuan Shu Ju Jie Gou Bian Dong (Ke Yi Cha Kan FE Dai Ma Zhong De FeMetaVersion.java Wen Jian Zhong Shi Fou You Xin Zeng De VERSION),Na Yao Zai Sheng Ji Dao Xin Ban Ben Hou ,Tong Chang Shi Wu Fa Zai Hui Gun Dao Jiu Ban Ben De . Suo Yi ,Zai Sheng Ji FE Zhi Qian ,Qing Wu Bi An Zhao Bu Shu He Sheng Ji Wen Dang Zhong Doris Sheng Ji Yi Jie Zhong De Cao Zuo ,Ce Shi Yuan Shu Ju Jian Rong Xing .

Wo Men Jia She Zai fe.conf Zhong Zhi Ding De meta_dir De Lu Jing Wei /path/to/palo-meta. Na Yao Yi Ge Zheng Chang Yun Xing Zhong De Doris Ji Qun ,Yuan Shu Ju De Mu Lu Jie Gou Ying Gai Ru Xia :

1. bdb Mu Lu

   Wo Men Jiang bdbje Zuo Wei Yi Ge Fen Bu Shi De kv Xi Tong ,Cun Fang Yuan Shu Ju De journal. Zhe Ge bdb Mu Lu Xiang Dang Yu bdbje De "Shu Ju Mu Lu ".

   Qi Zhong .jdb Hou Zhui De Shi bdbje De Shu Ju Wen Jian . Zhe Xie Shu Ju Wen Jian Hui Sui Zhao Yuan Shu Ju journal De Bu Duan Zeng Duo Er Yue Lai Yue Duo . Dang Doris Ding Qi Zuo Wan image Hou ,Jiu De Ri Zhi Jiu Hui Bei Shan Chu . Suo Yi Zheng Chang Qing Kuang Xia ,Zhe Xie Shu Ju Wen Jian De Zong Da Xiao Cong Ji MB Dao Ji GB Bu Deng (Qu Jue Yu Shi Yong Doris De Fang Shi ,Ru Dao Ru Pin Lu Deng ). Dang Shu Ju Wen Jian De Zong Da Xiao Da Yu 10GB,Ze Ke Neng Xu Yao Huai Yi Shi Fou Shi Yin Wei image Mei You Cheng Gong ,Huo Zhe Fen Fa image Shi Bai Dao Zhi De Li Shi journal Yi Zhi Wu Fa Shan Chu .

   je.info.0 Shi bdbje De Yun Xing Ri Zhi . Zhe Ge Ri Zhi Zhong De Shi Jian Shi UTC+0 Shi Qu De . Wo Men Ke Neng Zai Hou Mian De Mou Ge Ban Ben Zhong Xiu Fu Zhe Ge Wen Ti . Tong Guo Zhe Ge Ri Zhi ,Ye Ke Yi Cha Kan Yi Xie bdbje De Yun Xing Qing Kuang .

2. image Mu Lu

   image Mu Lu Yong Yu Cun Fang Doris Ding Qi Sheng Cheng De Yuan Shu Ju Jing Xiang Wen Jian . Tong Chang Qing Kuang Xia ,Ni Hui Kan Dao You Yi Ge image.xxxxx De Jing Xiang Wen Jian . Qi Zhong xxxxx Shi Yi Ge Shu Zi . Zhe Ge Shu Zi Biao Shi Gai Jing Xiang Bao Han xxxxx Hao Zhi Qian De Suo You Yuan Shu Ju journal. Er Zhe Ge Wen Jian De Sheng Cheng Shi Jian (Tong Guo ls -al Cha Kan Ji Ke )Tong Chang Jiu Shi Jing Xiang De Sheng Cheng Shi Jian .

   Ni Ye Ke Neng Hui Kan Dao Yi Ge image.ckpt Wen Jian . Zhe Shi Yi Ge Zheng Zai Sheng Cheng De Yuan Shu Ju Jing Xiang . Tong Guo du -sh Ming Ling Ying Gai Ke Yi Kan Dao Zhe Ge Wen Jian Da Xiao Zai Bu Duan Bian Da ,Shuo Ming Jing Xiang Nei Rong Zheng Zai Xie Ru Zhe Ge Wen Jian . Dang Jing Xiang Xie Wan Hou ,Hui Zi Dong Zhong Ming Wei Yi Ge Xin De image.xxxxx Bing Ti Huan Jiu De image Wen Jian .

   Zhi You Jiao Se Wei Master De FE Cai Hui Zhu Dong Ding Qi Sheng Cheng image Wen Jian . Mei Ci Sheng Cheng Wan Hou ,Du Hui Tui Song Gei Qi Ta Fei Master Jiao Se De FE. Dang Que Ren Qi Ta Suo You FE Du Shou Dao Zhe Ge image Hou ,Master FE Hui Shan Chu bdbje Zhong Jiu De Yuan Shu Ju journal. Suo Yi ,Ru Guo image Sheng Cheng Shi Bai ,Huo Zhe image Tui Song Gei Qi Ta FE Shi Bai Shi ,Du Hui Dao Zhi bdbje Zhong De Shu Ju Bu Duan Lei Ji .

   ROLE Wen Jian Ji Lu Liao FE De Lei Xing (FOLLOWER Huo OBSERVER),Shi Yi Ge Wen Ben Wen Jian .

   VERSION Wen Jian Ji Lu Liao Zhe Ge Doris Ji Qun De cluster id,Yi Ji Yong Yu Ge Ge Jie Dian Zhi Jian Fang Wen Ren Zheng De token,Ye Shi Yi Ge Wen Ben Wen Jian .

   ROLE Wen Jian He VERSION Wen Jian Zhi Ke Neng Tong Shi Cun Zai ,Huo Tong Shi Bu Cun Zai (Ru Di Yi Ci Qi Dong Shi ).

Dan Jie Dian FE Shi Zui Ji Ben De Yi Chong Bu Shu Fang Shi . Yi Ge Wan Zheng De Doris Ji Qun ,Zhi Shao Xu Yao Yi Ge FE Jie Dian . Dang Zhi You Yi Ge FE Jie Dian Shi ,Zhe Ge Jie Dian De Lei Xing Wei Follower,Jiao Se Wei Master.

1. Di Yi Ci Qi Dong

   1. Jia She Zai fe.conf Zhong Zhi Ding De meta_dir De Lu Jing Wei /path/to/palo-meta.

   2. Que Bao /path/to/palo-meta Yi Cun Zai ,Quan Xian Zheng Que ,Qie Mu Lu Wei Kong .

   3. Zhi Jie Tong Guo sh bin/start_fe.sh Ji Ke Qi Dong .

   4. Qi Dong Hou ,Ni Ying Gai Ke Yi Zai fe.log Zhong Kan Dao Ru Xia Ri Zhi :

      • Palo FE starting...
      • image does not exist: /path/to/palo-meta/image/image.0
      • transfer from INIT to UNKNOWN
      • transfer from UNKNOWN to MASTER
      • the very first time to open bdb, dbname is 1
      • start fencing, epoch number is 1
      • finish replay in xxx msec
      • QE service start
      • thrift server started

      Yi Shang Ri Zhi Bu Yi Ding Yan Ge An Zhao Zhe Ge Shun Xu ,Dan Ji Ben Lei Si .

   5. Dan Jie Dian FE De Di Yi Ci Qi Dong Tong Chang Bu Hui Yu Dao Wen Ti . Ru Guo Ni Mei You Kan Dao Yi Shang Ri Zhi ,Yi Ban Lai Shuo Shi Mei You Zi Xi An Zhao Wen Dang Bu Zou Cao Zuo ,Qing Zi Xi Yue Du Xiang Guan wiki.

2. Zhong Qi

   1. Zhi Jie Shi Yong sh bin/start_fe.sh Ke Yi Zhong Xin Qi Dong Yi Jing Ting Zhi De FE Jie Dian .

   2. Zhong Qi Hou ,Ni Ying Gai Ke Yi Zai fe.log Zhong Kan Dao Ru Xia Ri Zhi :

      • Palo FE starting...

      • finished to get cluster id: xxxx, role: FOLLOWER and node name: xxxx

      • Ru Guo Zhong Qi Qian Huan Mei You image Chan Sheng ,Ze Hui Kan Dao :

        • image does not exist: /path/to/palo-meta/image/image.0

      • Ru Guo Zhong Qi Qian You image Chan Sheng ,Ze Hui Kan Dao :

        • start load image from /path/to/palo-meta/image/image.xxx. is ckpt: false
        • finished load image in xxx ms

      • transfer from INIT to UNKNOWN

      • replayed journal id is xxxx, replay to journal id is yyyy

      • transfer from UNKNOWN to MASTER

      • finish replay in xxx msec

      • master finish replay journal, can write now.

      • begin to generate new image: image.xxxx

      • start save image to /path/to/palo-meta/image/image.ckpt. is ckpt: true

      • finished save image /path/to/palo-meta/image/image.ckpt in xxx ms. checksum is xxxx

      • push image.xxx to other nodes. totally xx nodes, push successed xx nodes

      • QE service start

      • thrift server started

      Yi Shang Ri Zhi Bu Yi Ding Yan Ge An Zhao Zhe Ge Shun Xu ,Dan Ji Ben Lei Si .

3. Chang Jian Wen Ti

   Dui Yu Dan Jie Dian FE De Bu Shu ,Qi Ting Tong Chang Bu Hui Yu Dao Shi Yao Wen Ti . Ru Guo You Wen Ti ,Qing Xian Can Zhao Xiang Guan wiki,Zi Xi He Dui Ni De Cao Zuo Bu Zou .

Tian Jia FE Liu Cheng Zai Bu Shu He Sheng Ji Wen Dang You Xiang Xi Jie Shao ,Bu Zai Zhui Shu . Zhe Li Zhu Yao Shuo Ming Yi Xie Zhu Yi Shi Xiang ,Yi Ji Chang Jian Wen Ti .

1. Zhu Yi Shi Xiang

   • Zai Tian Jia Xin De FE Zhi Qian ,Yi Ding Xian Que Bao Dang Qian De Master FE Yun Xing Zheng Chang (Lian Jie Shi Fou Zheng Chang ,JVM Shi Fou Zheng Chang ,image Sheng Cheng Shi Fou Zheng Chang ,bdbje Shu Ju Mu Lu Shi Fou Guo Da Deng Deng )
   • Di Yi Ci Qi Dong Xin De FE,Yi Ding Que Bao Tian Jia Liao -helper Can Shu Zhi Xiang Master FE. Zai Ci Qi Dong Shi Ke Bu Yong Tian Jia -helper. (Ru Guo Zhi Ding Liao -helper,FE Hui Zhi Jie Xun Wen helper Jie Dian Zi Ji De Jiao Se ,Ru Guo Mei You Zhi Ding ,FEHui Chang Shi Cong palo-meta/image/ Mu Lu Xia De ROLE He VERSION Wen Jian Zhong Huo Qu Xin Xi ).
   • Di Yi Ci Qi Dong Xin De FE,Yi Ding Que Bao Zhe Ge FE De meta_dir Yi Jing Chuang Jian , Quan Xian Zheng Que Qie Wei Kong .
   • Qi Dong Xin De FE,He Zhi Xing ALTER SYSTEM ADD FOLLOWER/OBSERVER Yu Ju Zai Yuan Shu Ju Tian Jia FE,Zhe Liang Ge Cao Zuo De Shun Xu Mei You Xian Hou Yao Qiu . Ru Guo Xian Qi Dong Liao Xin De FE,Er Mei You Zhi Xing Yu Ju ,Ze Xin De FE Ri Zhi Zhong Hui Yi Zhi Gun Dong current node is not added to the group. please add it first. Zi Yang . Dang Zhi Xing Yu Ju Hou ,Ze Hui Jin Ru Zheng Chang Liu Cheng .
   • Qing Que Bao Qian Yi Ge FE Tian Jia Cheng Gong Hou ,Zai Tian Jia Xia Yi Ge FE.
   • Jian Yi Zhi Jie Lian Jie Dao MASTER FE Zhi Xing ALTER SYSTEM ADD FOLLOWER/OBSERVER Yu Ju .

2. Chang Jian Wen Ti

   1. this node is DETACHED

      Dang Di Yi Ci Qi Dong Yi Ge Dai Tian Jia De FE Shi ,Ru Guo Master FE Shang De palo-meta/bdb Zhong De Shu Ju Hen Da ,Ze Ke Neng Zai Dai Tian Jia De FE Ri Zhi Zhong Kan Dao this node is DETACHED. Zi Yang . Zhe Shi ,bdbje Zheng Zai Fu Zhi Shu Ju ,Ni Ke Yi Kan Dao Dai Tian Jia De FE De bdb/ Mu Lu Zheng Zai Bian Da . Zhe Ge Guo Cheng Tong Chang Hui Zai Shu Fen Zhong Bu Deng (Qu Jue Yu bdbje Zhong De Shu Ju Liang ). Zhi Hou ,fe.log Zhong Ke Neng Hui You Yi Xie bdbje Xiang Guan De Cuo Wu Dui Zhan Xin Xi . Ru Guo Zui Zhong Ri Zhi Zhong Xian Shi QE service start He thrift server started,Ze Tong Chang Biao Shi Qi Dong Cheng Gong . Ke Yi Tong Guo mysql-client Lian Jie Zhe Ge FE Chang Shi Cao Zuo . Ru Guo Mei You Chu Xian Zhe Xie Zi Yang ,Ze Ke Neng Shi bdbje Fu Zhi Ri Zhi Chao Shi Deng Wen Ti . Zhe Shi ,Zhi Jie Zai Ci Zhong Qi Zhe Ge FE,Tong Chang Ji Ke Jie Jue Wen Ti .

   2. Ge Chong Yuan Yin Dao Zhi Tian Jia Shi Bai

      • Ru Guo Tian Jia De Shi OBSERVER,Yin Wei OBSERVER Lei Xing De FE Bu Can Yu Yuan Shu Ju De Duo Shu Xie ,Li Lun Shang Ke Yi Sui Yi Qi Ting . Yin Ci ,Dui Yu Tian Jia OBSERVER Shi Bai De Qing Kuang . Ke Yi Zhi Jie Sha Si OBSERVER FE De Jin Cheng ,Qing Kong OBSERVER De Yuan Shu Ju Mu Lu Hou ,Zhong Xin Jin Xing Yi Bian Tian Jia Liu Cheng .

      • Ru Guo Tian Jia De Shi FOLLOWER,Yin Wei FOLLOWER Shi Can Yu Yuan Shu Ju Duo Shu Xie De . Suo Yi You Ke Neng FOLLOWER Yi Jing Jia Ru bdbje Xuan Ju Zu Nei . Ru Guo Zhe Shi Zhi You Liang Ge FOLLOWER Jie Dian (Bao Gua MASTER),Na Yao Ting Diao Yi Ge FE,Ke Neng Dao Zhi Ling Yi Ge FE Ye Yin Wu Fa Jin Xing Duo Shu Xie Er Tui Chu . Ci Shi ,Wo Men Ying Gai Xian Tong Guo ALTER SYSTEM DROP FOLLOWER Ming Ling ,Cong Yuan Shu Ju Zhong Shan Chu Xin Tian Jia De FOLLOWER Jie Dian ,Ran Hou Zai Sha Si FOLLOWER Jin Cheng ,Qing Kong Yuan Shu Ju ,Zhong Xin Jin Xing Yi Bian Tian Jia Liu Cheng .

Tong Guo ALTER SYSTEM DROP FOLLOWER/OBSERVER Ming Ling Ji Ke Shan Chu Dui Ying Lei Xing De FE. Yi Xia You Ji Dian Zhu Yi Shi Xiang :

• Dui Yu OBSERVER Lei Xing De FE,Zhi Jie DROP Ji Ke ,Wu Feng Xian .

• Dui Yu FOLLOWER Lei Xing De FE. Shou Xian ,Ying Bao Zheng Zai You Qi Shu Ge FOLLOWER De Qing Kuang Xia (3Ge Huo Yi Shang ),Kai Shi Shan Chu Cao Zuo .

  1. Ru Guo Shan Chu Fei MASTER Jiao Se De FE,Jian Yi Lian Jie Dao MASTER FE,Zhi Xing DROP Ming Ling ,Zai Sha Si Jin Cheng Ji Ke .
  2. Ru Guo Yao Shan Chu MASTER FE,Xian Que Ren You Qi Shu Ge FOLLOWER FE Bing Qie Yun Xing Zheng Chang . Ran Hou Xian Sha Si MASTER FE De Jin Cheng . Zhe Shi Hui You Mou Yi Ge FE Bei Xuan Ju Wei MASTER. Zai Que Ren Sheng Xia De FE Yun Xing Zheng Chang Hou ,Lian Jie Dao Xin De MASTER FE,Zhi Xing DROP Ming Ling Shan Chu Zhi Qian Lao De MASTER FE Ji Ke .

FE You Ke Neng Yin Wei Mou Xie Yuan Yin Chu Xian Wu Fa Qi Dong bdbje, FE Zhi Jian Wu Fa Tong Bu Deng Wen Ti . Xian Xiang Bao Gua Wu Fa Jin Xing Yuan Shu Ju Xie Cao Zuo , Mei You MASTER Deng Deng . Zhe Shi ,Wo Men Xu Yao Shou Dong Cao Zuo Lai Hui Fu FE. Shou Dong Hui Fu FE De Da Zhi Yuan Li ,Shi Xian Tong Guo Dang Qian meta_dir Zhong De Yuan Shu Ju ,Qi Dong Yi Ge Xin De MASTER,Ran Hou Zai Zhu Tai Tian Jia Qi Ta FE. Qing Yan Ge An Zhao Ru Xia Bu Zou Cao Zuo :

1. Shou Xian ,Ting Zhi Suo You FE Jin Cheng ,Tong Shi Ting Zhi Yi Qie Ye Wu Fang Wen . Bao Zheng Zai Yuan Shu Ju Hui Fu Qi Jian ,Bu Hui Yin Wei Wai Bu Fang Wen Dao Zhi Qi Ta Bu Ke Yu Qi De Wen Ti .

2. Que Ren Na Ge FE Jie Dian De Yuan Shu Ju Shi Zui Xin :

   • Shou Xian ,Wu Bi Xian Bei Fen Suo You FE De meta_dir Mu Lu .
   • Tong Chang Qing Kuang Xia ,Master FE De Yuan Shu Ju Shi Zui Xin De . Ke Yi Cha Kan meta_dir/image Mu Lu Xia ,image.xxxx Wen Jian De Hou Zhui ,Shu Zi Yue Da ,Ze Biao Shi Yuan Shu Ju Yue Xin .
   • Tong Chang ,Tong Guo Bi Jiao Suo You FOLLOWER FE De image Wen Jian ,Zhao Chu Zui Xin De Yuan Shu Ju Ji Ke .
   • Zhi Hou ,Wo Men Yao Shi Yong Zhe Ge Yong You Zui Xin Yuan Shu Ju De FE Jie Dian ,Jin Xing Hui Fu .
   • Ru Guo Shi Yong OBSERVER Jie Dian De Yuan Shu Ju Jin Xing Hui Fu Hui Bi Jiao Ma Fan ,Jian Yi Jin Liang Xuan Ze FOLLOWER Jie Dian .

3. Yi Xia Cao Zuo Du Zai You Di 2Bu Zhong Xuan Ze Chu Lai De FE Jie Dian Shang Jin Xing .

   1. Ru Guo Gai Jie Dian Shi Yi Ge OBSERVER,Xian Jiang meta_dir/image/ROLE Wen Jian Zhong De role=OBSERVER Gai Wei role=FOLLOWER. (Cong OBSERVER Jie Dian Hui Fu Hui Bi Jiao Ma Fan ,Xian An Zhe Li De Bu Zou Cao Zuo ,Hou Mian Hui You Dan Du Shuo Ming )
   2. Zai fe.conf Zhong Tian Jia Pei Zhi :metadata_failure_recovery=true.
   3. Zhi Xing sh bin/start_fe.sh Qi Dong Zhe Ge FE.
   4. Ru Guo Zheng Chang ,Zhe Ge FE Hui Yi MASTER De Jiao Se Qi Dong ,Lei Si Yu Qian Mian Qi Dong Dan Jie Dian FE Yi Jie Zhong De Miao Shu . Zai fe.log Ying Gai Hui Kan Dao transfer from XXXX to MASTER Deng Zi Yang .
   5. Qi Dong Wan Cheng Hou ,Xian Lian Jie Dao Zhe Ge FE,Zhi Xing Yi Xie Cha Xun Dao Ru ,Jian Cha Shi Fou Neng Gou Zheng Chang Fang Wen . Ru Guo Bu Zheng Chang ,You Ke Neng Shi Cao Zuo You Wu ,Jian Yi Zi Xi Yue Du Yi Shang Bu Zou ,Yong Zhi Qian Bei Fen De Yuan Shu Ju Zai Shi Yi Ci . Ru Guo Huan Shi Bu Xing ,Wen Ti Ke Neng Jiu Bi Jiao Yan Zhong Liao .
   6. Ru Guo Cheng Gong ,Tong Guo show frontends; Ming Ling ,Ying Gai Ke Yi Kan Dao Zhi Qian Suo Tian Jia De Suo You FE,Bing Qie Dang Qian FE Shi master.
   7. Jiang fe.conf Zhong De metadata_failure_recovery=true Pei Zhi Xiang Shan Chu ,Huo Zhe She Zhi Wei false,Ran Hou Zhong Qi Zhe Ge FE(Zhong Yao ).

   Ru Guo Ni Shi Cong Yi Ge OBSERVER Jie Dian De Yuan Shu Ju Jin Xing Hui Fu De ,Na Yao Wan Cheng Ru Shang Bu Zou Hou ,Tong Guo show frontends; Yu Ju Ni Hui Fa Xian ,Dang Qian Zhe Ge FE De Jiao Se Wei OBSERVER,Dan Shi IsMaster Xian Shi Wei true. Zhe Shi Yin Wei ,Zhe Li Kan Dao De "OBSERVER" Shi Ji Lu Zai Doris De Yuan Shu Ju Zhong De ,Er Shi Fou Shi master,Shi Ji Lu Zai bdbje De Yuan Shu Ju Zhong De . Yin Wei Wo Men Shi Cong Yi Ge OBSERVER Jie Dian Hui Fu De ,Suo Yi Zhe Li Chu Xian Liao Bu Yi Zhi . Qing An Ru Xia Bu Zou Xiu Fu Zhe Ge Wen Ti (Zhe Ge Wen Ti Wo Men Hui Zai Zhi Hou De Mou Ge Ban Ben Xiu Fu ):

   1. Xian Ba Chu Liao Zhe Ge "OBSERVER" Yi Wai De Suo You FE Jie Dian DROP Diao .
   2. Tong Guo ADD FOLLOWER Ming Ling ,Tian Jia Yi Ge Xin De FOLLOWER FE,Jia She Zai hostA Shang .
   3. Zai hostA Shang Qi Dong Yi Ge Quan Xin De FE,Tong Guo -helper De Fang Shi Jia Ru Ji Qun .
   4. Qi Dong Cheng Gong Hou ,Tong Guo show frontends; Yu Ju ,Ni Ying Gai Neng Kan Dao Liang Ge FE,Yi Ge Shi Zhi Qian De OBSERVER,Yi Ge Shi Xin Tian Jia De FOLLOWER,Bing Qie OBSERVER Shi master.
   5. Que Ren Zhe Ge Xin De FOLLOWER Shi Ke Yi Zheng Chang Gong Zuo Zhi Hou ,Yong Zhe Ge Xin De FOLLOWER De Yuan Shu Ju ,Zhong Xin Zhi Xing Yi Bian Gu Zhang Hui Fu Cao Zuo .
   6. Yi Shang Zhe Xie Bu Zou De Mu De ,Qi Shi Jiu Shi Ren Wei De Zhi Zao Chu Yi Ge FOLLOWER Jie Dian De Yuan Shu Ju ,Ran Hou Yong Zhe Ge Yuan Shu Ju ,Zhong Xin Kai Shi Gu Zhang Hui Fu . Zhe Yang Jiu Bi Mian Liao Cong OBSERVER Hui Fu Yuan Shu Ju Suo Yu Dao De Bu Yi Zhi De Wen Ti .

   metadata_failure_recovery=true De Han Yi Shi ,Qing Kong "bdbje" De Yuan Shu Ju . Zhe Yang bdbje Jiu Bu Hui Zai Lian Xi Zhi Qian De Qi Ta FE Liao ,Er Zuo Wei Yi Ge Du Li De FE Qi Dong . Zhe Ge Can Shu Zhi You Zai Hui Fu Qi Dong Shi Cai Xu Yao She Zhi Wei true. Hui Fu Wan Cheng Hou ,Yi Ding Yao She Zhi Wei false,Fou Ze Yi Dan Zhong Qi ,bdbje De Yuan Shu Ju You Hui Bei Qing Kong ,Dao Zhi Qi Ta FE Wu Fa Zheng Chang Gong Zuo .

4. Di 3Bu Zhi Xing Cheng Gong Hou ,Wo Men Zai Tong Guo ALTER SYSTEM DROP FOLLOWER/OBSERVER Ming Ling ,Jiang Zhi Qian De Qi Ta De FE Cong Yuan Shu Ju Shan Chu Hou ,An Jia Ru Xin FE De Fang Shi ,Zhong Xin Ba Zhe Xie FE Tian Jia Yi Bian .

5. Ru Guo Yi Shang Cao Zuo Zheng Chang ,Ze Hui Fu Wan Bi .

Ru Guo Ni Xu Yao Jiang Dang Qian Yi You De FOLLOWER/OBSERVER Lei Xing De FE,Bian Geng Wei OBSERVER/FOLLOWER Lei Xing ,Qing Xian An Zhao Qian Mian Suo Shu De Fang Shi Shan Chu FE,Zai Tian Jia Dui Ying Lei Xing De FE Ji Ke

Ru Guo Ni Xu Yao Jiang Yi Ge FE Cong Dang Qian Jie Dian Qian Yi Dao Ling Yi Ge Jie Dian ,Fen Yi Xia Ji Chong Qing Kuang .

1. Fei MASTER Jie Dian De FOLLOWER,Huo Zhe OBSERVER Qian Yi

   Zhi Jie Tian Jia Xin De FOLLOWER/OBSERVER Cheng Gong Hou ,Shan Chu Jiu De FOLLOWER/OBSERVER Ji Ke .

2. Dan Jie Dian MASTER Qian Yi

   Dang Zhi You Yi Ge FE Shi ,Can Kao Gu Zhang Hui Fu Yi Jie . Jiang FE De palo-meta Mu Lu Kao Bei Dao Xin Jie Dian Shang ,An Zhao Gu Zhang Hui Fu Yi Jie Zhong ,Bu Zou 3De Fang Shi Qi Dong Xin De MASTER

3. Yi Zu FOLLOWER Cong Yi Zu Jie Dian Qian Yi Dao Ling Yi Zu Xin De Jie Dian

   Zai Xin De Jie Dian Shang Bu Shu FE,Tong Guo Tian Jia FOLLOWER De Fang Shi Xian Jia Ru Xin Jie Dian . Zai Zhu Tai DROP Diao Jiu Jie Dian Ji Ke . Zai Zhu Tai DROP De Guo Cheng Zhong ,MASTER Hui Zi Dong Xuan Ze Zai Xin De FOLLOWER Jie Dian Shang .

FE Mu Qian You Yi Xia Ji Ge Duan Kou

• edit_log_port:bdbje De Tong Xin Duan Kou
• http_port:http Duan Kou ,Ye Yong Yu Tui Song image
• rpc_port:FE De thrift server port
• query_port:Mysql Lian Jie Duan Kou

1. edit_log_port

   Ru Guo Xu Yao Geng Huan Zhe Ge Duan Kou ,Ze Xu Yao Can Zhao Gu Zhang Hui Fu Yi Jie Zhong De Cao Zuo ,Jin Xing Hui Fu . Yin Wei Gai Duan Kou Yi Jing Bei Chi Jiu Hua Dao bdbje Zi Ji De Yuan Shu Ju Zhong (Tong Shi Ye Ji Lu Zai Doris Zi Ji De Yuan Shu Ju Zhong ),Xu Yao Tong Guo She Zhi metadata_failure_recovery=true Lai Qing Kong bdbje De Yuan Shu Ju .

2. http_port

   Suo You FE De http_port Bi Xu Bao Chi Yi Zhi . Suo Yi Ru Guo Yao Xiu Gai Zhe Ge Duan Kou ,Ze Suo You FE Du Xu Yao Xiu Gai Bing Zhong Qi . Xiu Gai Zhe Ge Duan Kou ,Zai Duo FOLLOWER Bu Shu De Qing Kuang Xia Hui Bi Jiao Fu Za (She Ji Dao Ji Sheng Dan Dan Sheng Ji De Wen Ti ...),Suo Yi Bu Jian Yi You Zhe Chong Cao Zuo . Ru Guo Bi Xu ,Zhi Jie An Zhao Gu Zhang Hui Fu Yi Jie Zhong De Cao Zuo Ba .

3. rpc_port

   Xiu Gai Pei Zhi Hou ,Zhi Jie Zhong Qi FE Ji Ke . Master FE Hui Tong Guo Xin Tiao Jiang Xin De Duan Kou Gao Zhi BE. Zhi You Master FE De Zhe Ge Duan Kou Hui Bei Shi Yong . Dan Reng Ran Jian Yi Suo You FE De Duan Kou Bao Chi Yi Zhi .

4. query_port

   Xiu Gai Pei Zhi Hou ,Zhi Jie Zhong Qi FE Ji Ke . Zhe Ge Zhi Ying Xiang Dao mysql De Lian Jie Mu Biao .

FE De Bu Shu Tui Jian ,Zai Doris Bu Shu He Sheng Ji Wen Dang Zhong You Bu Fen Jie Shao ,Zhe Li Zai Zuo Yi Xie Bu Chong .

• Ru Guo Ni Bing Bu Shi Fen Liao Jie FE Yuan Shu Ju De Yun Xing Luo Ji ,Huo Zhe Mei You Zu Gou FE Yuan Shu Ju De Yun Wei Jing Yan ,Wo Men Qiang Lie Jian Yi Zai Shi Ji Shi Yong Zhong ,Zhi Bu Shu Yi Ge FOLLOWER Lei Xing De FE Zuo Wei MASTER,Qi Yu FE Du Shi OBSERVER,Zhe Yang Ke Yi Jian Shao Hen Duo Fu Za De Yun Wei Wen Ti ! Bu Yong Guo Yu Dan Xin MASTER Dan Dian Gu Zhang Dao Zhi Wu Fa Jin Xing Yuan Shu Ju Xie Cao Zuo . Shou Xian ,Ru Guo Ni Pei Zhi He Li ,FE Zuo Wei java Jin Cheng Hen Nan Gua Diao . Qi Ci ,Ru Guo MASTER Ci Pan Sun Pi (Gai Lu Fei Chang Di ),Wo Men Ye Ke Yi Yong OBSERVER Shang De Yuan Shu Ju ,Tong Guo Gu Zhang Hui Fu De Fang Shi Shou Dong Hui Fu .

• FE Jin Cheng De JVM Yi Ding Yao Bao Zheng Zu Gou De Nei Cun . Wo Men Qiang Lie Jian Yi FE De JVM Nei Cun Zhi Shao Zai 10GB Yi Shang ,Tui Jian 32GB Zhi 64GB. Bing Qie Bu Shu Jian Kong Lai Jian Kong JVM De Nei Cun Shi Yong Qing Kuang . Yin Wei Ru Guo FEChu Xian OOM,Ke Neng Dao Zhi Yuan Shu Ju Xie Ru Shi Bai ,Zao Cheng Yi Xie Wu Fa Hui Fu De Gu Zhang !

• FE Suo Zai Jie Dian Yao You Zu Gou De Ci Pan Kong Jian ,Yi Fang Zhi Yuan Shu Ju Guo Da Dao Zhi Ci Pan Kong Jian Bu Zu . Tong Shi FE Ri Zhi Ye Hui Zhan Yong Shi Ji G De Ci Pan Kong Jian .

1. fe.log Zhong Yi Zhi Gun Dong meta out of date. current time: xxx, synchronized time: xxx, has log: xxx, fe type: xxx

   Zhe Ge Tong Chang Shi Yin Wei FE Wu Fa Xuan Ju Chu Master. Bi Ru Pei Zhi Liao 3 Ge FOLLOWER,Dan Shi Zhi Qi Dong Liao Yi Ge FOLLOWER,Ze Zhe Ge FOLLOWER Hui Chu Xian Zhe Ge Wen Ti . Tong Chang ,Zhi Yao Ba Sheng Yu De FOLLOWER Qi Dong Qi Lai Jiu Ke Yi Liao . Ru Guo Qi Dong Qi Lai Hou ,Reng Ran Mei You Jie Jue Wen Ti ,Na Yao Ke Neng Xu Yao An Zhao Gu Zhang Hui Fu Yi Jie Zhong De Fang Shi ,Shou Dong Jin Xing Hui Fu .

2. Clock delta: xxxx ms. between Feeder: xxxx and this Replica exceeds max permissible delta: xxxx ms.

   bdbje Yao Qiu Ge Ge Jie Dian Zhi Jian De Shi Zhong Wu Chai Bu Neng Chao Guo Yi Ding Yu Zhi . Ru Guo Chao Guo ,Jie Dian Hui Yi Chang Tui Chu . Wo Men Mo Ren She Zhi De Yu Zhi Wei 5000 ms,You FE De Can Shu max_bdbje_clock_delta_ms Kong Zhi ,Ke Yi Zhuo Qing Xiu Gai . Dan Wo Men Jian Yi Shi Yong ntp Deng Shi Zhong Tong Bu Fang Shi Bao Zheng Doris Ji Qun Ge Zhu Ji De Shi Zhong Tong Bu .

3. image/ Mu Lu Xia De Jing Xiang Wen Jian Hen Jiu Mei You Geng Xin

   Master FE Hui Mo Ren Mei 50000 Tiao Yuan Shu Ju journal,Sheng Cheng Yi Ge Jing Xiang Wen Jian . Zai Yi Ge Pin Fan Shi Yong De Ji Qun Zhong ,Tong Chang Mei Ge Ban Tian Dao Ji Tian De Shi Jian ,Jiu Hui Sheng Cheng Yi Ge Xin De image Wen Jian . Ru Guo Ni Fa Xian image Wen Jian Yi Jing Hen Jiu Mei You Geng Xin Liao (Bi Ru Chao Guo Yi Ge Xing Qi ),Ze Ke Yi Shun Xu De An Zhao Ru Xia Fang Fa ,Cha Kan Ju Ti Yuan Yin :

   1. Zai Master FE De fe.log Zhong Sou Suo memory is not enough to do checkpoint. Committed memroy xxxx Bytes, used memory xxxx Bytes. Zi Yang . Ru Guo Zhao Dao ,Ze Shuo Ming Dang Qian FE De JVM Nei Cun Bu Zu Yi Yong Yu Sheng Cheng Jing Xiang (Tong Chang Wo Men Xu Yao Yu Liu Yi Ban De FE Nei Cun Yong Yu image De Sheng Cheng ). Na Yao Xu Yao Zeng Jia JVM De Nei Cun Bing Zhong Qi FE Hou ,Zai Guan Cha . Mei Ci Master FE Zhong Qi Hou ,Du Hui Zhi Jie Sheng Cheng Yi Ge Xin De image. Ye Ke Yong Zhe Chong Zhong Qi Fang Shi ,Zhu Dong Di Sheng Cheng Xin De image. Zhu Yi ,Ru Guo Shi Duo FOLLOWER Bu Shu ,Na Yao Dang Ni Zhong Qi Dang Qian Master FE Hou ,Ling Yi Ge FOLLOWER FE Hui Bian Cheng MASTER,Ze Hou Xu De image Sheng Cheng Hui You Xin De Master Fu Ze . Yin Ci ,Ni Ke Neng Xu Yao Xiu Gai Suo You FOLLOWER FE De JVM Nei Cun Pei Zhi .

   2. Zai Master FE De fe.log Zhong Sou Suo begin to generate new image: image.xxxx. Ru Guo Zhao Dao ,Ze Shuo Ming Kai Shi Sheng Cheng image Liao . Jian Cha Zhe Ge Xian Cheng De Hou Xu Ri Zhi ,Ru Guo Chu Xian checkpoint finished save image.xxxx,Ze Shuo Ming image Xie Ru Cheng Gong . Ru Guo Chu Xian Exception when generate new image file,Ze Sheng Cheng Shi Bai ,Xu Yao Cha Kan Ju Ti De Cuo Wu Xin Xi .

4. bdb/ Mu Lu De Da Xiao Fei Chang Da ,Da Dao Ji Ge GHuo Geng Duo

   Ru Guo Zai Pai Chu Wu Fa Sheng Cheng Xin De image De Cuo Wu Hou ,bdb Mu Lu Zai Yi Duan Shi Jian Nei Yi Ran Hen Da . Ze Ke Neng Shi Yin Wei Master FE Tui Song image Bu Cheng Gong . Ke Yi Zai Master FE De fe.log Zhong Sou Suo push image.xxxx to other nodes. totally xx nodes, push successed yy nodes. Ru Guo yy Bi xx Xiao ,Ze Shuo Ming You De FE Mei You Bei Tui Song Cheng Gong . Ke Yi Zai fe.log Zhong Cha Kan Dao Ju Ti De Cuo Wu Exception when pushing image file. url = xxx.

   Tong Shi ,Ni Ye Ke Yi Zai FE De Pei Zhi Wen Jian Zhong Tian Jia Pei Zhi :edit_log_roll_num=xxxx. Gai Can Shu She Ding Liao Mei Duo Shao Tiao Yuan Shu Ju journal,Zuo Yi Ci image. Mo Ren Shi 50000. Ke Yi Gua Dang Gai Xiao Zhe Ge Shu Zi ,Shi De image Geng Jia Pin Fan ,Cong Er Jia Su Shan Chu Jiu De journal.

5. FOLLOWER FE Jie Lian Gua Diao

   Yin Wei Doris De Yuan Shu Ju Cai Yong Duo Shu Xie Ce Lue ,Ji Yi Tiao Yuan Shu Ju journal Bi Xu Zhi Shao Xie Ru Duo Shu Ge FOLLOWER FE Hou (Bi Ru 3 Ge FOLLOWER,Bi Xu Xie Cheng Gong 2 Ge ),Cai Suan Cheng Gong . Er Ru Guo Xie Ru Shi Bai ,FE Jin Cheng Hui Zhu Dong Tui Chu . Na Yao Jia She You A, B, C San Ge FOLLOWER,C Xian Gua Diao ,Ran Hou B Zai Gua Diao ,Na Yao A Ye Hui Gen Zhao Gua Diao . Suo Yi Ru Zui Jia Shi Jian Yi Jie Zhong Suo Shu ,Ru Guo Ni Mei You Feng Fu De Yuan Shu Ju Yun Wei Jing Yan ,Bu Jian Yi Bu Shu Duo FOLLOWER.

6. fe.log Zhong Chu Xian get exception when try to close previously opened bdb database. ignore it

   Ru Guo Hou Mian You ignore it Zi Yang ,Tong Chang Wu Xu Chu Li . Ru Guo Ni You Xing Qu ,Ke Yi Zai BDBEnvironment.java Sou Suo Zhe Ge Cuo Wu ,Cha Kan Xiang Guan Zhu Shi Shuo Ming .

7. Cong show frontends; Kan ,Mou Ge FE De Join Lie Wei true,Dan Shi Shi Ji Gai FE Bu Zheng Chang

   Tong Guo show frontends; Cha Kan Dao De Join Xin Xi . Gai Lie Ru Guo Wei true,Jin Biao Shi Zhe Ge FE Ceng Jing Jia Ru Guo Ji Qun . Bing Bu Neng Biao Shi Dang Qian Reng Ran Zheng Chang De Cun Zai Yu Ji Qun Zhong . Ru Guo Wei false,Ze Biao Shi Zhe Ge FE Cong Wei Jia Ru Guo Ji Qun .

8. Guan Yu FE De Pei Zhi master_sync_policy, replica_sync_policy He txn_rollback_limit

   master_sync_policy Yong Yu Zhi Ding Dang Leader FE Xie Yuan Shu Ju Ri Zhi Shi ,Shi Fou Diao Yong fsync(), replica_sync_policy Yong Yu Zhi Ding Dang FE HA Bu Shu Shi ,Qi Ta Follower FE Zai Tong Bu Yuan Shu Ju Shi ,Shi Fou Diao Yong fsync(). Zai Zao Qi De Doris Ban Ben Zhong ,Zhe Liang Ge Can Shu Mo Ren Shi WRITE_NO_SYNC,Ji Du Bu Diao Yong fsync(). Zai Zui Xin Ban Ben De Doris Zhong ,Mo Ren Yi Xiu Gai Wei SYNC,Ji Du Diao Yong fsync(). Diao Yong fsync() Hui Xian Zhu Jiang Di Yuan Shu Ju Xie Pan De Xiao Lu . Zai Mou Xie Huan Jing Xia ,IOPS Ke Neng Jiang Zhi Ji Bai ,Yan Chi Zeng Jia Dao 2-3ms(Dan Dui Yu Doris Yuan Shu Ju Cao Zuo Yi Ran Gou Yong ). Yin Ci Wo Men Jian Yi Yi Xia Pei Zhi :

   1. Dui Yu Dan Follower FE Bu Shu ,master_sync_policy She Zhi Wei SYNC,Fang Zhi FE Xi Tong Dang Ji Dao Zhi Yuan Shu Ju Diu Shi .
   2. Dui Yu Duo Follower FE Bu Shu ,Ke Yi Jiang master_sync_policy He replica_sync_policy She Wei WRITE_NO_SYNC,Yin Wei Wo Men Ren Wei Duo Ge Xi Tong Tong Shi Dang Ji De Gai Lu Fei Chang Di .

   Ru Guo Zai Dan Follower FE Bu Shu Zhong ,master_sync_policy She Zhi Wei WRITE_NO_SYNC,Ze Ke Neng Chu Xian FE Xi Tong Dang Ji Dao Zhi Yuan Shu Ju Diu Shi . Zhe Shi Ru Guo You Qi Ta Observer FE Chang Shi Zhong Qi Shi ,Ke Neng Hui Bao Cuo :Node xxx must rollback xx total commits(numPassedDurableCommits of which were durable) to the earliest point indicated by transaction xxxx in order to rejoin the replication group, but the transaction rollback limit of xxx prohibits this.,Yi Si You Bu Fen Yi Jing Chi Jiu Hua De Shi Wu Xu Yao Hui Gun ,Dan Tiao Shu Chao Guo Shang Xian . Zhe Li Wo Men De Mo Ren Shang Xian Shi 100,Ke Yi Tong Guo She Zhi txn_rollback_limit Gai Bian . Gai Cao Zuo Jin Yong Yu Chang Shi Zheng Chang Qi Dong FE,Dan Yi Diu Shi De Yuan Shu Ju Wu Fa Hui Fu .