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Re: Running a Sqoop script in the background appea...

by Guru in Support Questions
‎11-09-2015 04:19 PM
1 Kudo
‎11-09-2015 04:19 PM
1 Kudo
@Kent Baxley did you have a chance to try using screen before uninstalling Accumulo client? Based on your discovery that redirecting output (sqoop.sh &> /dev/null &) was successful, I would think using screen would also work. ... View more

Re: Has anyone integrated (for demo purposes only)...

by Guru in Support Questions
‎11-06-2015 05:15 PM
‎11-06-2015 05:15 PM
Wow, good catch. Unfortunately I'm still getting the same error with pagination disabled, so maybe it's a different feature that ApacheDS doesn't support: REASON: Caught exception running LDAP sync. [LDAP: error code 12 - Unsupport critical control: 1.2.840.113556.1.4.319]; nested exception is javax.naming.OperationNotSupportedException: [LDAP: error code 12 - Unsupport critical control: 1.2.840.113556.1.4.319]; remaining name 'dc=hadoop,dc=apache,dc=org' ... View more

Guidelines for initial garbage collection settings...

by Guru in Support Questions
‎11-04-2015 04:59 AM
2 Kudos
‎11-04-2015 04:59 AM
2 Kudos
After studying the basics on Java GC, it seems like the Serial (default) GC would be best for YARN containers (low core:task ratio), and CMS or G1 would be best for long-running services that occupy more memory (master services and some edge servers). Are these assumptions valid? What is recommended for worker services? Is there any situation in the HDP ecosystem where it's recommended to start with ParallelGC or ParallelOldGC? I still hear of people using CMS, but it looks like that is replaced in favor of G1 as of Java 7+. Is there any reason to choose CMS over G1 when the latter is available? Are there additional garbage collectors worth learning about, beyond: Serial, Parallel, ParallelOld, CMS, and G1? ... View more

Re: Tez with Transaction with Bucketing

by Guru in Support Questions
‎11-04-2015 04:14 AM
‎11-04-2015 04:14 AM
Are the Tez jobs submitting to the same queue as MR jobs? (hive.server2.tez.default.queues, hive.server2.tez.sessions.per.default.queue) How do Tez container settings compare with general YARN container settings?(tez.am.resource.memory.mb, tez.am.java.opts, hive.tez.container.size, hive.tez.java.opts) ... View more

Re: Best practices for spanning AWS availability z...

by Guru in Support Questions
‎11-02-2015 08:08 PM
‎11-02-2015 08:08 PM
Ok, across AWS Regions I understand, but it seems like AZs should have minimal performance impacts (latency isn't much higher) and would provide redundancy for HA. Either way, I'm glad to hear feedback from what is seen in the field and from other providers. ... View more

Re: Best Practices for using HCC

by Guru in Community Articles
‎11-02-2015 03:32 PM
‎11-02-2015 03:32 PM
Oops, #2 is answered on the wiki: Flag content that is not appropriate. Replying to abusive, off-topic, or inappropriate content only encourages it – whereas flagging allows removal without providing undue attention. To flag a question or answer, click the “Report” option next to the post. In the dialogue box, select the reason for the flag. ... View more

Re: Best Practices for using HCC

by Guru in Community Articles
‎11-02-2015 03:30 PM
‎11-02-2015 03:30 PM
Two additional questions regarding best practices for this community: When/how are "available votes" replenished? It looks like I started with 20, and after I spend them they slowly increase over time. This falls under best practices because it should influence how people spend their votes. Is there a tag we're using to indicate "attention needed" before AH becomes publicly visible? More like "let's get a second set of eyes to see if this needs scrubbing" as opposed to an aggressive "Violation!" ... View more

Re: Best practices for zookeeper placement?

by Guru in Support Questions
‎11-01-2015 01:04 AM
2 Kudos
‎11-01-2015 01:04 AM
2 Kudos
Excellent tips, thank you. Is there a guideline for when to add another pair of ZK servers? Cluster size, number of services that use ZK, any services that are particularly demanding, etc? ... View more

Re: How to identify stale datanode?

by Guru in Support Questions
‎11-01-2015 12:54 AM
‎11-01-2015 12:54 AM
No worries, we're all learning it as we go ... View more

Re: How to identify stale datanode?

by Guru in Support Questions
‎10-30-2015 06:22 PM
‎10-30-2015 06:22 PM
Thanks, hopefully it will save someone the hassle in the future. In the future, please leave this as a comment rather than a separate answer. ... View more
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Member Since ‎09-11-2015 01:40 PM
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