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🦉owlcache

🦉owlcache is a lightweight, high-performance, non-centralized, distributed Key/Value in-memory Cache written in Go.It is an independent process and high-performance data middleware, and provides a variety of data get and import methods.You can query a node's key to get all the content with the same key in the node cluster(One Key to Many Values). After operating the Key of a node, the data will be automatically synchronized to all node clusters.

Highlights and features

• 💡Cross-platform operation
• 🚀Single node ultra high performance
• ⛓Non-centralized, distributed
• 🎯One Key to Many Values
• 🌈Data concurrency security
• 🔍Support data expiration
• 🖥Key/Value Data storage
• 🎨Easy to use, only a few operating commands
• ⚔️Authentication
• 📝Logging
• 🔭Support TCP and HTTP/HTTPS, WebSocket (Search) connections
• 🍻Support Memcache、 Redis(String)、Url data import

Documentation

• 📝中文简体
• 📝English

Sub Project

🦌 deerfs:Using it, you can build a simple decentralized file system. Project address: deerfs

How to compile

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How to compile

Compilation environment requirements

• golang >= 1.9

Source download

• Go command download (will automatically download the dependent library, if you directly download the source code will prompt the class library is missing)

go get -u github.com/xssed/owlcache

⚠⚠⚠If 'go mod' is ON in your go locale, you need to create a directory locally on your computer, enter the directory, and execute git clone https://github.com/xssed/owlcache.gitCommand to download the source code.

Build

• Enter the owlcache home directory and execute the compilation command (in gopath mode, enter the owlcache home directory of gopath directory, and in gomod mode, enter the local directory you created in the previous prompt)

go build

Run

• Note that the owlcache.conf file should be in the same directory as the main program.
• The .conf configuration file must be a uniform UTF-8 encoding.
• Set the option in the configuration file owlcache.conf.

Linux

./owlcache

Windows (DOS)

• If you plan to use cmd.exe to run owlcache for a long time, please right-click and select [Properties]->[Options]->Close [Quick Edit Mode] and [Insert Mode] in the pop-up menu, otherwise long-running owlcache will appear Caton or dormancy phenomenon.

owlcache

Parameter help

• You can check out the help before running.
• Note that the runtime configuration parameters take precedence over the configuration parameters in the *.conf file.

owlcache -help

Welcome to use owlcache. Version:XXX
If you have any questions,Please contact us: [email protected]
Project Home:https://github.com/xssed/owlcache
                _                _
   _____      _| | ___ __ _  ___| |__   ___
  / _ \ \ /\ / / |/ __/ _' |/ __| '_ \ / _ \
 | (_) \ V  V /| | (_| (_| | (__| | | |  __/
  \___/ \_/\_/ |_|\___\__,_|\___|_| |_|\___|

Usage of owlcache:
  -config string
        owlcache config file path.[demo:/var/home/owl.conf] (default "owlcache.conf")
  -host string
        binding local host ip address. (default "0.0.0.0")
  -log string
        owlcache log file path.[demo:/var/log/] (default "./log_file/")
  -pass string
        owlcache Http connection password. (default "")

Example with configuration parameter run

owlcache -config /var/home/owl.conf -host 127.0.0.1 -log /var/log/ -pass 1245!df2A

Simple use example

Single node to get the Key value

• TCP command: get <key>\n

get hello\n

• HTTP Note: HTTP access data is not verified by password, only other operations that change data require authentication.

Request parameter	Parameter value
cmd	get
key	key name

http://127.0.0.1:7721/data/?cmd=get&key=hello

• Websocket command: get <key>

get hello

Response result example:

world

If it is an HTTP request, there will be Key details in the response message.
Key: hello
Keycreatetime: 2021-11-26 18:12:45.1932019 +0800 CST
Responsehost: 127.0.0.1:7721

Single node to get the Key value info

• TCP command: get <key> info\n

get hello info\n

• HTTP

owlcache version >= 0.4.2, http no longer supports 'info'

http://127.0.0.1:7721/data/?cmd=get&key=hello&valuedata=info

• Websocket command: get <key> info <Custom return string (not necessary, such as UUID)>

get hello info

or

get hello info 5c9eff00-3bed-4113-a095-2f3c771683d9

Response result example:

{
    "Cmd": "get",
    "Status": 200,
    "Results": "SUCCESS",
    "Key": "hello",
    "Data": "d29ybGQ=",
    "ResponseHost": "127.0.0.1:7721",
    "KeyCreateTime": "2021-11-09T14:12:36.8431596+08:00"
}

Attention to the HTTP Status code returned by the HTTP Request. please refer to the "Protocol" chapter.

The cluster obtains the Key value.

• Suppose there are now three owlcache HTTP services: 127.0.0.1: 7721, 127.0.0.1:7723, 127.0.0.1:7725. Each service has a data called Key called hello.

Request parameter	Parameter value
cmd	get
key	key name

http://127.0.0.1:7721/group_data/?cmd=get&key=hello

Response result example:

world

The result obtained is the latest value of the update time in the cluster query.

The cluster obtains the key value information

http://127.0.0.1:7721/group_data/?cmd=get&key=hello&valuedata=info

Response result example:

[
    {
        "Address": "127.0.0.1:7721",
        "Data": "d29ybGQ=",
        "Key": "hello",
        "KeyCreateTime": "2021-11-26T18:12:45.1932019+08:00",
        "Status": 200
    },
    {
        "Address": "127.0.0.1:7723",
        "Data": "d29ybGQ=",
        "Key": "hello",
        "KeyCreateTime": "2021-11-12T11:34:53.0952566+08:00",
        "Status": 200
    },
    {
        "Address": "127.0.0.1:7725",
        "Data": "d29ybGQ=",
        "Key": "hello",
        "KeyCreateTime": "2021-11-11T11:34:53.0952522+08:00",
        "Status": 200
    }
]

The result is the information about which node in the cluster owns this Key.

...more please refer to the detailed description of the document

Design

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FAQ

1.owlcache does not have master-slave mode. If a key is written to a node and the node crashes, then the key cannot be accessed?？

The author believes that the master-slave mode will occupy a lot of server resources and cause excessive data redundancy(Exception: One Key maps multiple values). It is recommended that important keys can be written to more than two nodes at the same time when setting, so that the access to keys is almost unaffected in the relative case. If all nodes in the cluster are down, it is really impossible to access the key.

2.How to choose the cluster mode of owlcache?

There are three clustering modes of owlcache, namely "Http" (short link), "Websocket" (long link) and "Gossip" (data is eventually consistent).
★If your business volume is small, you can choose the "Http" (short link) cluster method.
★If your business volume is large, you can choose the "Websocket" (long link) cluster method.
★The "Gossip" (data eventually consistent) clustering method does not conflict with the previous two clustering methods, and they can coexist. However, you need to pay attention to the configuration items and debug the complex server network environment. You can understand that the previous two methods are active clustering, and the latter is passive clustering,Used to synchronize data in the cluster.However, if you turn on "Gossip", the use case of your cluster having multiple values ​​for one key will become meaningless.

Development and discussion(not involved in business cooperation)

• Email📪:[email protected]
• Homepage🛀:https://www.xsser.cc