objstore | A Multi-Master Distributed Caching Layer for Amazon S3 | Storage library
kandi X-RAY | objstore Summary
kandi X-RAY | objstore Summary
This project aims to provide an easy to use, self-organising multi-master caching layer for various cloud stoarge backends, e.g. S3. It combines functionality of a simple object storage with added robustness of cross-node journal synchronisation, object replication and cluster auto-discovery. We know that Amazon S3 has proven to be fast and reliable, a PaaS solution that acts like a backbone for many business applications. But the cost of service may become too high depending on your usage patterns, for example, if your application runs in your own datacenter, then the file transfer costs will skyrocket. Also request frequency has its limits. Objstore Cluster aims to mitigate this problem, it's supposed to be running in your datacenter, implementing a near-cache for all files. Its API allows to upload, head, read and delete files by key, like any other object. All related meta-data may be perserved with files as well. This caching layer will upload the file to S3 and store a copy locally, with optional replication among other nodes. Next time you'd access the file, it will be served from a local machine, or its near nodes, in case of a cache miss, it will get the file from S3 directly. The cluster must be robust, altrough it's not required to reach the same levels as traditional DBs or other stores that are required to be highly consistent, a certant amount of fault resilience is important because a dropped cache implies a huge (and unplanned) spike in latency and CoS, which may hurt infrastructure and your wallet. And caches may recover very slowly. Objstore leverages a P2P discovery mechanism, so once some nodes are started already, another one might join knowing only one physical IP address. The cluster setups a logical network over persistent TCP connections between nodes and uses an internal HTTP API to share events and data between nodes, eliminating the single point of failure. Everything involves zero configuration, except the HTTP load balancer which may be any of your choice. Node disk sizes are required to be identical, the overall limit of the cluster is limited by size of the smallest disk used for data replication. If you want to expand the size linearly, setup another Object Store cluster and tweak your HTTP load balancer.
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Top functions reviewed by kandi - BETA
- NewStore creates a new Store
- appMain starts the application .
- pumpEventAnnounce returns a copy of the passed channel to the dst channel .
- putObject uploads an object to the request
- forEachNode iterates over all nodes in the given router
- Main entry point .
- serveMeta serves FileMeta response .
- ListenAndServe starts a new HTTP server
- serveObject serves objectstore .
- waitWG waits until the given timeout is reached .
objstore Key Features
objstore Examples and Code Snippets
Lines of Code : 34License : Permissive (MIT)
Copy$ curl localhost:10999/api/v1/get/01BRNMMS1DK3CBD4ZZM2TQ8C5B
It works!
$ curl -v localhost:10999/api/v1/get/01BRNMMS1DK3CBD4ZZM2TQ8C5B
< HTTP/1.1 200 OK
< Accept-Ranges: bytes
< Content-Length: 9
< Content-Type: text/plain; charset=utf $ objstore -h
Usage: objstore [OPTIONS]
A Multi-Master Distributed Caching Layer for Amazon S3.
Version 0.1 http://github.com/SphereSoftware/objstore
Options:
-d, --debug Debug level to use, currently 0/1 suppported. ($APP_ $ curl localhost:10999/api/v1/id
01BRNMMS1DK3CBD4ZZM2TQ8C5B
// ConsistencyLocal flags file for local persistence only, implying
// that the file body will be stored on a single node. Default.
ConsistencyLocal ConsistencyLevel = 0
// Community Discussions
Trending Discussions on objstore
QUESTION
I have two functions in VB that I use for archiving my emails on completed projects. The first opens either all of my previous year email stores, or just one at a time. These PST files are stored on Dropbox, so as soon as Outlook opens the PST files, it locks them and won't let Dropbox sync the files. Right now, I have a third routine that closes all open PST files, shuts Outlook down and calls a batch file that restarts outlook without the PST files open so that Dropbox can finish syncing.
...ANSWER
Answered 2022-Apr-02 at 03:36By default, the MSUPST provider keeps a PST file referenced and loaded for 30 minutes. Or until the PST provider dll itself gets unloaded (e.g. when the host process terminates).
You might want to play with the registry key mentioned in https://www.betaarchive.com/wiki/index.php/Microsoft_KB_Archive/222328
Another solution that will always work is to wrap your PST processing functionality into a separate exe that does not use Outlook Object Model (e.g. you can use Redemption (I am its author) and its RDOSession.LogonPstStore method to open PST files) and launch it from your main executable. When the auxiliary process exits, your main executable should be able to manipulate the PST file.
QUESTION
I want to store my API data in indexedDB of Browser. I would have tried local storage but it has a limit of 5MB but my JSON data is more than 7MB. I want to save in indexedDB for faster access. I want to save the whole data in the JSON format but don't know how to set the scheme of the indexed DB. The data fetched from the database is testData
...ANSWER
Answered 2021-May-18 at 18:30Follow these steps for good architecture and reusable components ( Sample project is created here ):-
1 ) Create one file lets just name it indexDB.js
QUESTION
I'm trying to link my jQuery table with IndexedDB (IDB). Currently, I'm able to add items to the browser UI and to IDB successfully, which generates an identifier key. When the item is pulled from IDB I've stored the identifier key in a hidden column at the furthest right of the table (see screenshot) for each item.
What I want to do is delete the item from the UI and IDB. My code from line 26 of the main.js (bottom-right in screenshot) is successfully deleting the item from the UI, however the code at line 32 isn't deleting the item from IDB as required.
I've run both an alert/console.log for the variable (line 34) which is reporting the correct key identifier has been stored in the variable, but seems to be functioning unusually in that it is reporting it multiple times based on which row is selected in the table (i.e. if I delete "exercise" it reports 36 on three separate alerts?). The variable is then not correctly deleted. However, if I run line 35 and pass the literal key identifier into it (i.e. "36") instead of a variable, the item is deleted.
Any suggestions would be really welcome, thank you!
Screenshot[1]
Table and code https://i.stack.imgur.com/Etb2S.png
Full code available here (please note I've included all separate files on the JS page) https://codepen.io/QuiveringCoward/pen/gOMqpRv
...ANSWER
Answered 2020-Nov-13 at 15:41I discovered that there's also a function that you can call to delete the data from IndexedDB, it's called deleteOne() and all you have to do is find the key of the data that needed to be deleted. I solved it with this code
QUESTION
I have a class to test named ClassToTest. It calls a CloudService to upload file.
...ANSWER
Answered 2020-Jan-31 at 22:04This will not work.
If you had used injection, then adding @RunWith(MockitoJUnitRunner.class) would have been useful, but it is not.
If you can use Injection, then do it, otherwise you have to use PowerMockito in order to modify bytecode and produce a mock when invoking a constructor. This can help you
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