uptime tracker

Fastdfs is an open source lightweight Distributed File system consisting of a tracking server (tracker server), a storage server (storage server), and clients (client), which mainly solves the problem of massive data storage, Especially suitable for medium and small documents (recommended range: 4KB Deployment Schema: Environment IP address (firewall that shuts down all environments): Tracker 192.168.18.1

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command (11) Uname Command Used to display information about the operating system. Hostname Displays or sets the Host Name of the current system. Dmesg Displays the boot information to diagnose system faults. Uptime Displays the system running time and load. Stat Displays the status of a file or file system. Du Calculate disk space usage. Df Reports disk space usage o

Mcelog is a tool used on x86 Linux systems to check for hardware errors, especially memory and CPU errors.For example, the server is inexplicably restarted over time, and message and syslog do not detect valuable information.The cause of the MCE error usually occurs as follows:1, memory error or ECC problem2. Processor Overheating3. System bus Error4, CPU or hardware cache errorIn general, when there are error prompts, you need to pay attention to memory problems, but because the memory controll

from node// (5) View replica set statusAfter you start the replication set, view the full state information for the replica set again through the Rs.status () commandKgcrs:secondary> Rs.status () {"Set": "Kgcrs", "date": Isodate ("2018-07-17t07:18:52.047z"), "MyState": 1, "Term": Numberlong (1), "syncingto": "", "Syncsourcehost": "", "Syncsourceid":-1, "Heartbeatintervalmilli S ": Numberlong (+)," Optimes ": {" Lastcommittedoptime ": {" ts ": Timestamp (1531811928, 1), "T"

I. Summary The client and storage server actively connect to tracker server. Storage server proactively reports its status information to tracker server, including statistics such as disk space remaining, file synchronization status, file upload download times, and so on. Storage Server connects all tracker servers in the cluster and reports their status to them

Package and compress. Oldboy Unzip Decompress the file. Gzip Gzip compression tool. Zip Compression tool. Information Display command (11) Uname Command Used to display information about the operating system. Hostname Displays or sets the Host Name of the current system. Dmesg Displays the boot information to diagnose system faults. Uptime Displays the sys

. grep/egrep: Filter string.19. join is merged based on the same fields of the two files.20. tr replace or delete characters.21. vi/vim Command Line Text Editor4. File compression and decompression commands (4)1.tar package Compression2. unzip and decompress the file.3.gzip gzip compression tool.4.zip compression Tool5. Information Display command (11)1. uname command for displaying operating system information2. the hostname displays or sets the Host Name of the current system.3. dmesg displays

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CPU usage (Part III) M-Arranges the list of processes in the Order of Memory occupancy (Part III) H-Show help N-Sets the number of processes displayed in the process list Q-Exit Top S- Linux Viewing performance changes screen update cycle Part three--The process list bar in the bottom section: The PID-Differentiated process list updates periodically according to the set of screens. Linux viewing performance controls how this is displayed through the top internal command. ? The first 5 lines of

FastDFS installation and deployment 1. installation environment1.1 System EnvironmentSystem: Minimal RedHat 6.4 Installation Versions: 2.6.32-358. el6.x86 _ 64 1.2 Software VersionFastDFS version: FastDFS_v3.06.tar.gz Nginx version: nginx-1.0.11.tar.gz FastDFS-Nginx-module version: fastdfs-nginx-module_v1.10.tar.gz 1.3 directory structure/Data/fastdfs/Stores logs and data 1.4 Role AssignmentTwo trackers Tracker1: 192.168.199.125 Tracker2: 192.168.199.126 Two storage Storage1: 192.168.199.126 Sto

/local/lib/libfdfsclient. so.1/usr/local/lib/libfdfsclient. soSh./fdfs_link_library.shCongratulations! the installation is successful!FastDFS configurationThe FastDFS configuration file is in the % FastDFS %/conf Directory, includingClient. conf Client uploads configuration filesStorage. conf file Storage server configuration fileTracker. conf is responsible for the configuration file of the balanced scheduling server.Http. conf http server configuration fileThe configuration file needs to be co

whole storage system. A group can consist of one or more storage servers, and the files in a storage server under a group are the same, and multiple storage servers in group play a role of redundant backup and load balancing (one group has storage capacity of the smallest storage server in the group. Different groups of storage servers do not communicate with each other, and storage servers within the same group are connected to each other for file synchronization. When adding servers to the gr

Integration with Bug Tracking System/problem tracking In software development, modification depends on a bug or problem number. Users of the Bug Tracking System (problem tracker) like to associate the modification of the subversion with a specified number in the problem tracking. Therefore, many problem trackers provide a pre-submitted hook script to analyze logs and find the submitted bug numbers. This is slightly less reliable, because it relies o

Install, configure, and migrate FastDFSV3.02Background: We used fastdfsV3.02 on the original server, and now we want to migrate it to the new server. There are no relevant documents on the Internet and it has been a long time. Now we will record the migration process as follows to facilitate the configuration and migration of other students.Tracker server: 192.168.1.246 Storage Server: 192.168.1.246 Deploy tracker and storage on the same server when

). The direction of the packet can also be obtained by ctinfo/ip_ct_is_reply, but a more convenient macro ctinfo2dir (Ctinfo) can be used, defined in Connection Tracker The connection tracker is a very important part of the connection tracking architecture and relates to the implementation of the State firewall. Its main task is to find the corresponding connection information for an IP packet and ensure

Fastdfs Introduction Fastdfs is an open-source distributed file system that manages files, including file storage, file synchronization, and file access (File Upload and file download, it solves the problems of large-capacity storage and load balancing. It is especially suitable for online services with files as the carrier, such as photo album websites and video websites. The fastdfs server has two roles: tracker and storage ). The