schumihan

6 ms·

1.
by schumihan 15y ago
Cassandra is a good fit for write heavy workload, as it is optimized for write...
2.
by schumihan 15y ago
Agreed. You can achieve very high productivity if you use Scala and Java properly.
3.
by schumihan 15y ago
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-mobil...
4.
by schumihan 15y ago
"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...
5.
by schumihan 15y ago
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?
6.
by schumihan 16y ago
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 different customers' data, unless all of them use the same key.
7.
by schumihan 16y ago
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?
8.
by schumihan 16y ago
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 it easy for others to review your code. If these short-lived
9.
by schumihan 16y ago
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 interesting found implies how goo.gl is designed. They pr
10.
by schumihan 16y ago
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-coordinator, bigtable and other auxilary roles. I suspect some roles
11.
by schumihan 16y ago
Unlike Bigtable/HBase, cassandra is fully distributed, either, just as Dynamo...
12.
by schumihan 16y ago
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, you should tune the GC settings. Besides it, JVM itself consum
13.
by schumihan 16y ago
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, as it was not developed for gnome environment.
14.
by schumihan 16y ago
+1 for beanstalkd. Zero deployment and blazing fast!
15.
by schumihan 16y ago
Why are there so many "best papers" on CHI 2010?
16.
by schumihan 16y ago
I like winmerge. Even kdiff3 is not as useful as winmerge, IMHO. http://kdiff3.sourceforge.net/
17.
by schumihan 16y ago
On their hardware appliance, they use a special instruction to implement the barrier. For software appliance, the performance may be a real problem.
18.
by schumihan 16y ago
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 many users in the system.
19.
by schumihan 16y ago
But why do they not hide the interface directly?
20.
by schumihan 16y ago
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.
21.
by schumihan 16y ago
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 big project, many hackers work with C++ can use it either, as
22.
by schumihan 16y ago
Reference count based GC? How would you deal with circular reference?
23.
by schumihan 16y ago
Is it similar to ZeroMQ( http://www.zeromq.org/ )?
24.
by schumihan 16y ago
Are you use 0.6.x branch or 0.7 branch? 0.6.x is quite stable in my deployment.
25.
by schumihan 16y ago
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 pickup cassandra. The consistency model is not so hard to work
26.
by schumihan 16y ago
UDP is more easier to penetrate a firewall, IMHO...
27.
Mint: The Evolution from prototype to a Successful Web Service(slideshare.net)
3 points by schumihan 16y ago|0 comments
28.
by schumihan 16y ago
You can work with much higher productivity in java...
29.
by schumihan 16y ago
I don't think so. Percolator does not support stream operators, and it supports transaction semantic. Streaming process engine like s4 will never handle the race conditions brought by multiple writers.
30.
by schumihan 16y ago
I'm one of them. The weakness of yuku is most of the videos are uploaded by the website itself, not the user generated content. The reasons behind it is quite complicated...

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