zfs storage architecture

(above "architecture design: System storage (23)-data consistency and Paxos algorithm (above)")2-1-1. Prapare Preparation PhaseThere are several data attributes that need to be persisted on the acceptor role first: Preparevote holds the maximum voting rounds for the completed voting authorization received by the current acceptor Acceptedvote saves the polling rounds for the current acceptor to

(Above "Architecture Design: System Storage (23)-Data consistency and Paxos algorithm (above)")2-1-1. Prapare Preparation PhaseFirst, there are several data attributes that need to be persisted on the acceptor role: Preparevote holds the maximum voting rounds for the completed voting authorization received by the current acceptor Acceptedvote saves the polling rounds of the current acceptor at

, LATENCY history, LATENCY RESET, LATENCY GRAPH, Doctor LATENCY. Latency monitor features are described in more detail in the official Redis documentation: Https://redis.io/topics/latency-monitor.Latency-monitor-threshold, this parameter is used to set the operating time threshold, if the delay monitoring function is turned off, you can set this value to 0. In addition, the client connection can set this threshold independently, only after the successful connection of the Redis server, the "CONF

, simple: fast, stable, safe?2, how to solve such a large amount of traffic caused by the large amount of data processing and storage? Involves:1. System2. Hardware Application scenario: 1, Shopping category 2, Community class This problem involves a lot of knowledge, the experience will be very rich I do not know whether our community has a type of problem, but I just want you to share your own experience and ideas I suggest you consider a few ques

the most space-saving wayMainly divided into Pctfree and pctusedFree 10% means that only 90% of the space can be depositedIf the original cannot be written, a row migration action is made, and the entire row is migrated to another blockSetting a pctfree is to some extent avoiding the migration of this kind of situation to produceUsed 40% indicates that the data will not be inserted until it drops to 40%This is to prevent a frequent rise and fallBlock parametersInitrans: InitialMaxtrans: Max v

FilesRedo log is actually a very important thing, redo is usually specified when building a library.selectfrom v$logTurn on archive mode1. See if it is in archive mode:loglistlog mode No Archive ModeAutomatic archival DisabledArchive destination /u01/app/oracle/product/11.2.0log sequence 36log sequence 382. Backing Up the database3. Edit PfileLOG_ARCHIVE_DEST="/u01/app/oracle/oradata/test58/archive"Make sure you have this directory.4. Start the database, bu

save the above partition information: Step 3 : Format The XFS file system#mkf. xfs/dev/sdb1 Step 4 : Mount the hard drive device to the /newfs directory#Mkdir/newfs#mount/dev/sdb1/newfs Step 5 : Set the system to automatically mount the hard drive device after booting#vim/etc/fstab/DEV/SDB1/NEWFSXFS Defaults 0 0 Step 6 : View the file system situation:DF is used to view mount point information and disk usage-a displays all file systems ( including virtual )-H easier-to-read capacity format-I sh

searched from the sorting tree order on disk.A data update on the LSM tree does not require disk access and can be done in memory, much faster than a B + tree. When data access is written primarily, while read operations focus on recently written data, using the LSM tree can greatly reduce the number of disk accesses and speed up access. RAID vs HDFS RAID (Redundant array of Inexpensive disks) technology is primarily designed to improve disk access latency and enhance disk availab