distributed

问题 I tried to read the document multiple times but failed to understand it. Can someone explain it in layman's terms? 回答1: TrueTime is an API available at Google that directly exposes clock uncertainty. Comparing to standard datetime libraries, instead of a particular timestamp, TrueTime's now() function returns an interval of time [earliest, latest]. It also provides two functions: after(t) returns true if t has definitely passed. E.g. t < now().earliest . before(t) returns true if t has

问题 I am currently working with project that huge amount of https requests (~15K~20K per second) need be sent via node.js server (node v4.2.6). The general relevant code structure can be seen at final of this post. We have tried by sending approximately 10~20 https requests per second, and every thing runs successfully, meaning there should not have problems on requests header and body itself. However, issues occurs when we start scaling up Nodejs server for sending thousands and millions

问题 I am using Visual Studio 2008 C# and SQL for my development. Which oracle version should i download? Oracle 10g? Does it have a design interface like sql server mangement studio? Will this distribution concept have a graphical tool which say "Hi, on which servers would you like to distributed the database and on what basis"? Using a local application, when I connect to its server and try to enter or delete data not on that server, will the oracle DB management system transparently access

问题 We are currently using Hazelcast 3.1.5. I have a simple distributed locking mechanism that is supposed to provide thread safety across multiple JVM nodes. Code is pretty simple. private static HazelcastInstance hInst = getHazelcastInstance(); private IMap<String, Integer> mapOfLocks = null; ... ... mapOfLocks = hInst.getMap("mapOfLocks"); if (mapOfLocks.get(name) == null) { mapOfLocks.put(name,1); mapOfLocks.lock(name); } else { mapOfLocks.put(name,mapOfLocks.get(name)+1); } ... <STUFF

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . Disclaimer : I already asked this question, but without the deployment requirement. I got an answer that got 3 upvotes, and when I edited the question to include the deployment requirement the answer then became irrelevant. The reason I'm resubmitting is because SO considers the

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I am learning about REST API and I am unable to understand how REST is used in distributed web application? This is the only reference i have seen. But still I am unable to learn about REST for distributed computing. Thank You in advance. 回答1: It isn’t really clear to me, what you

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I want to design a job scheduler cluster, which contains several hosts to do cron job scheduling. For example, a job which needs run every 5 minutes is submitted to the cluster, the cluster should point out which host to fire next run, making sure: Disaster tolerance: if not all of

问题 I'm interested in cross-colo fail-over strategies for web applications, such that if the main site fails users seamlessly land at the fail-over site in another colo. The application side of things looks to be mostly figured out with a master-slave database setup between the colos and services designed to recover and be able to pick up mid-stream. I'm trying to figure out the strategy for moving traffic from the main site to the fail-over site. DNS failover, even with low TTLs, seems to carry

问题 Do you got any idea how to build an oe project with distributed bitbake compile? I've thinked about distcc. export PATH=~/distcc/bin:$PATH make -jn CC=linux-gcc make will call linux-gcc from my path which points to distcc. distcc will schedule the tasks to all known hosts. -jn will create n6 instances of make. It works fine. But now I want to use distcc with bitbake. I know how to use -jn with bitbake. Just use export PARALLEL_MAKE=-jn But how to use export PATH=~/distcc/bin:$PATH with

问题 I am looking for a reasonably well tested library+server to store a persistent distributed hash table. I am hesistant to use SQL-based solutions as the data is highly document oriented, consisting of millions of ~64KB blobs with only a single index (computed by hash of said BLOB) - and needs to be able to be distributed for long term scaling prospects. Due to expense and bandwidth considerations, external solutions such as S3 are not an option. Something like CouchDB or Project Voldemort