Viewing profile — schumihan

Cassandra is a good fit for write heavy workload, as it is optimized for write...

Agreed. You can achieve very high productivity if you use Scala and Java properly.

I just notice VIA and HTC are founded by the same woman[1], and I know the financial situation of VIA is not good... [1] http://blog.laptopmag.com/2011-most-important-women-in-mobi…

"A user's data is stored in a single row in HBase" Some column families of HBase can be accumulated to hundreds of mega bytes very easily, I'm afraid...

The token in cookie stored by browser is portable, either. How can web apps prevent the attackers exploiting the system from stealing the cookie token?

When different customers use different key to encrypt the data, even if the source is the same, the outcome is different. So it is not feasible to do de-duplication across differen…

Does SpiderOak only provide backup service? Erasure encoding is efficient for cold data. Do you use erasure encoding to distribute the hot data across clusters?

I use patch queue[1] to manage these short lived branch, and it works for my purpose. You just pop the patches and delete them all when you want to prunge the branch. It also make …

If I tries to shorten the url of http://google.com several times, goo.gl always give back different result. I just wonder will goo.gl merge theses url together sometime later? This…

The architecture of MegaStore is so complicated... There are so many roles in the system, e.g. stateless replicate server, different stateful paxos instances, stateful co-coordinat…

Unlike Bigtable/HBase, cassandra is fully distributed, either, just as Dynamo...

For any SQL/NoSQL system, the more RAM, the better. They need as much RAM as possible to cache the data. If you observed cassandra consumes a lot of RAM even with small dataset, yo…

Most of the time, I use both as a tool to do visual diff, instead of code merge. KDiff3 is not so good as winmerge as visual diff tool. And kdiff3 UI has small problem on Ubuntu, a…

+1 for beanstalkd. Zero deployment and blazing fast!

Why are there so many "best papers" on CHI 2010?

I like winmerge. Even kdiff3 is not as useful as winmerge, IMHO. http://kdiff3.sourceforge.net/

On their hardware appliance, they use a special instruction to implement the barrier. For software appliance, the performance may be a real problem.

I think this is reasonable. My guess: Gmail wants you to invite somebody in your contact list directly. And they are reluctant to reset the cap of invitation because there are so m…

But why do they not hide the interface directly?

Can we build a system above ZeroMQ for such purpose easily? I think the async semantic of ZeroMQ is suitable to mitigate the latency of multiple RPC.

It's very difficult to avoid it when thing goes complicating. A may reference B, B may reference C, ... and somewhere, X may reference back to A. If this strategy makes sense for b…

Reference count based GC? How would you deal with circular reference?

Is it similar to ZeroMQ( http://www.zeromq.org/ )?

Are you use 0.6.x branch or 0.7 branch? 0.6.x is quite stable in my deployment.

I suppose fb caches the recent messages in memory, and use HBASE as archive storage most of the time. It depends on the developer's favor to pick up a system. If it's me, I will pi…