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I have been looking for cloud computing / storage solutions for a long time (inspired by the Google Bigtable). But I can't find a easy-to-use, business-ready solution.
I'm searching a simple, fault tolerant, distributed Key=>Value DB like SimpleDB from Amazon.
I've seen things like:
: Simple and distributed, fault-tolerant Database. But it understands only JSON. No XML connectors etc.
: Nice Amazon EC2 interfaces. Open Standards & XML. But less distributed and less fault-tolerant? There are also a lot of open tickets with XEN/VMWare issues.
: Nice distributed, fault tolerant fs. But it's hard to configure. Are there any java connectors?
: Nice system which much more then abilities to store data. Uses its own Hadoop Distributed File System and has been testet on clusters with 2000 nodes.
* : Can't find an open-source alternative! It's a nice but expensive system for huge amounts of data. And you're addicted to Amazon.
Are there other, better solutions out there? Which one is the best to choose? Which one offers the smallest amount of SOF(Singe Point of Failure)?
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If this question can be reworded to fit the rules in the , please .
is another option which is very similar to CouchDB, but using query language very similar to SQL instead of map/reduce in JavaScript. It also supports indexes, query profiling, replication and storage of binary data.
It has huge amount of documentation which might be overwhelming at fist, so I would suggest to start with
How about ?
bl if there's an open source solution for what you're after, it'll surely be there.
Other projects include:
Another good list:
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Wikipedia says that Yahoo
So I'd say it counts for business-provenness, although I'm not sure whether it counts as a K/V value database.
Not on your list is the Friendfeed system of using .
It's hard for me to understand your priorities.
CouchDB is simple, fault-tolerant, and distributed, but somehow you exclude it because it doesn't have XML.
Are XML and Java connectors an unstated requirement?
(Anyway, CouchDB should in fact be excluded because it's young, its API isn't stable, and it's not a key-value store.)
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I use Google's
api, it's Xml, free, documented, cloud based, and has connectors for many languages. I think it will fill your bill if you want free hosting too.
Now if you want to host your own servers
is your answer, its key=>value based, uses flat files, and is the fastest database out there right now (very barebones compared to say Oracle, but incredibly good at storing and accessing data, about 1 million records per second, with about 10bytes of overhead (depending on the storage engine)). As for business ready TokyoCabinet is the heart of a service called Mixi, which is the equivalent of Japan's Facebook+MyPage, with several million heavy users, so it's actually very battle proven.
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If you want something like Bigtable, you can't go past
- they're both open-source Bigtable clones. One thing to consider, though, is if your requirements really are 'big enough' for Bigtable. It scales up to thousands of tablet servers, and as such, has quite a bit of infrastructure under it to enable that (for example, handling the expectation of regular node failures).
If you don't anticipate growing to, at the very least, tens of tablet servers, you might want to consider one of the proposed alternatives: You can't beat BerkelyDb for simplicity, or MySQL for ubiquity. If all you need is a key/value datastore, you can put a simple 'dict' wrapper around your database interface, and switch out your backend if you outgrow one.
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You might want to look at
which is modeled after google's bigtable.
Use The CouchDB
Whats wrong with JSON?
JSON to XML is trivial
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You might want to take a look at this (using MySQL as key-value store):
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is a company that commercializes Apache Hadoop, with some value-add of course, like productization, configuration, training & support services.
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Instead of looking for something inspired by Google's bigtable-
Why not just use bigtable directly?
You could write a front-end on Google App-Engine.
Good compilation of storage tools for your question :
has also received some attention as it supports table schemas, key value pairs and hash tables.
It uses Lua as an embedded scripting platform and uses HTTP as it's communication protocol Here is an .
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Stack Overflow works best with JavaScript enabled58cv网址导航1.The radio says it is ___ at night. A.snow B.cloud C.wind D.rainy_百度知道
1.The radio says it is ___ at night. A.snow B.cloud C.wind D.rainy
2. It's always _____ in缉姬光肯叱厩癸询含墨 the north of China.And there is too much___ A.snow,snow B.snowy snowC.Snowy,snowy D.snow,snowy3. _____ a beautiful coat!Yes,it's my favorite coat.& A.What&& b.how& c.when& d. where4. ____ is the book? It's very interesting& a.what &b. when &c. how &d. where5. who's ___(read) and ___(write)--- The students are.6. look! some children are singing.( ) are daning& A.the other B.other C.others D.another ones7. what ___ Jenny____ ? She's shy8. the students are ____ (listen) to their teacher&
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1.D 只有D 是adj2.B 3.A4.C5.r缉姬光肯叱厩癸询含墨eading, writing6.C7.does,feel8.listening
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2 B 3 A 4 C 5 reading writing 6C 7 is like 8 listening7 没有选项啊
1d2b3a4c5reading and writting 6a7?8listening初中英语，记得很久很久以前做过，都差不多还给老师了。
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求翻译：sometimes,there is too much water in a cloud. it gets too heavy and falls down.that's rain是什么意思？
sometimes,there is too much water in a cloud. it gets too heavy and falls down.that's rain
问题补充：
有时，在云水实在是太多了。它变得太沉重，瀑布down.that的雨水
有时,有太多的水中一片。 它太沉重和瀑布下”的雨,
有时，有许多水在云彩。 它得到太重，并且秋天down.that是雨
有时，在云计算是水太多了。它变得太重，和 down.that 的雨落
有时，在云水实在是太多了。它变得太沉重，瀑布down.that的雨水
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