Re: [VOTE] The 1st HBase 0.98.2 release candidate (RC0) is available

(via Tom White) -- Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White) -- Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White) -- Todd

Re: CCSHB : PASS!

, where you need to think about consequences over the system as a whole, and questions that go deeper in its architecture. It's a well elaborated exam indeed. Thanks again! Cristofer -- Todd Lipcon Software Engineer, Cloudera

Re: 0.92 and Read/writes not scaling

On Fri, Apr 13, 2012 at 9:06 PM, Stack st...@duboce.net wrote: On Fri, Apr 13, 2012 at 8:02 PM, Todd Lipcon t...@cloudera.com wrote: If you want to patch on the HBase side, you can edit HLog.java to remove the checks for the sync method, and have it only call hflush. It's only

Re: Sync latency

. On Thu, Apr 5, 2012 at 8:16 PM, Todd Lipcon t...@cloudera.com wrote: Hi Placido, Sounds like it might be related to HDFS-2379. Try updating to Hadoop 1.0.1 or CDH3u3 and you'll get a fix for that. You can verify by grepping for BlockReport in your DN logs - if the pauses on the hbase side

Re: Sync latency

(they last up to 30 seconds on bursts of up to 3 minutes). Does anyone have a clue as to what could be happening? Thanks. -- Todd Lipcon Software Engineer, Cloudera

Re: 0.92 and Read/writes not scaling

these two, got rid of  all of the 20 and 40 ms response times and dropped the average response time we measured from HBase by more than half.  Plus, we can push HBase a lot harder.  That had an effect on random read workload only Ron? Thanks, St.Ack -- Todd Lipcon Software Engineer

Re: 0.92 and Read/writes not scaling

. -- Todd Lipcon Software Engineer, Cloudera

Re: Improving HBase read performance (based on YCSB)

disk and network have plenty of unused bandwidth. How could I diagnose where the read bottleneck is? Any help would be greatly appreciated :) Thanks in advance! -- Bharath Ravi -- Bharath Ravi -- Todd Lipcon Software Engineer, Cloudera

Re: Improving HBase read performance (based on YCSB)

could I diagnose where the read bottleneck is? Any help would be greatly appreciated :) Thanks in advance! -- Bharath Ravi -- Todd Lipcon Software Engineer, Cloudera

Re: On 'routs' and traackr

and dry (we could have done better messaging around these contribs it seems) -- but nonetheless a timely reminder from the lads over at Traackr (sorry to see you go George and crew). St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: counters and scanners inconsistency

to be consistent even for the high rate counters.  I am wondering if there is a buffering issue with the htable scanner object if it is unable to obtain a lock on the row it will default to the data on disk? -- Todd Lipcon Software Engineer, Cloudera

Re: Question about HBase for OLTP

accesses. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: snappy error during completebulkload

from. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: hdfs-1623 Was: ceph and hbase.

: Andrey: A quick search led me to https://github.com/toddlipcon where you would be able to find: https://github.com/toddlipcon/hadoop-common Cheers On Sat, Dec 24, 2011 at 12:39 PM, Andrey Stepachev oct...@gmail.com wrote: 23 декабря 2011 г. 22:48 пользователь Todd Lipcon t...@cloudera.com

Re: ceph and hbase.

early next year. -Todd 20 декабря 2011 г. 11:46 пользователь Todd Lipcon t...@cloudera.comнаписал: Hi Andrey, I don't think anyone has ever run Ceph in a production use case, much less run it in a production use case with HBase. The SPOF problem is currently being addressed

Re: ceph and hbase.

tasks? -- Andrey. -- Todd Lipcon Software Engineer, Cloudera

Re: HBase and Consistency in CAP

in consistency and that it gives up parition tolerance? My understanding is that failure of one data node still doesn't impact client as they would re-adjust the list of available data nodes. -- Todd Lipcon Software Engineer, Cloudera

Re: Snappy for 0.90.4

the cloudera/patches/ directory. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: Hive+HBase performance is much poorer than Hive+HDFS

, the performance shall be quite similar. Can anyone explain the 40X slowdown? Thanks Weihua -- Todd Lipcon Software Engineer, Cloudera

Re: HBase Meetup during Hadoop World NYC '11

https://github.com/sonalgoyal/crux Nube Technologies http://www.nubetech.co http://in.linkedin.com/in/sonalgoyal -- Todd Lipcon Software Engineer, Cloudera

Re: HBase Meetup during Hadoop World NYC '11

I haven't gotten many responses so far. If there doesn't seem to be much interest, I may not spend the time to organize. If you're feeling too busy to answer the full survey, feel free to just reply with a +1 so I know there's some interest! -Todd On Fri, Aug 26, 2011 at 3:33 PM, Todd Lipcon t

HBase Meetup during Hadoop World NYC '11

questions. Thanks! Looking forward to seeing everyone, and meeting new folks there. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: Apparent data loss on 90.4 rc2 after partial zookeeper network partition (on MapR)

as well as Linux's behavior with all local filesystems I'm aware of. As far as I know it's the case with most NFS filers as well. Hence the existence of explicit fencing commands accessible via remote administrative interfaces on NetApps, for example. -Todd -- Todd Lipcon Software Engineer

Re: Quick Question about Bulk loading of HFiles Timestamps

that at the intersection of outputs A B will be the values from B. Thanks, Jacques -- Todd Lipcon Software Engineer, Cloudera

Re: Apparent data loss on 90.4 rc2 after partial zookeeper network partition (on MapR)

? Nope, we run it here on our dev cluster and didn't encounter any issue (with the code or node failure). Thanks again for your help.  I'm following up with the MapR guys as well. Good idea! J-D -- Have a Nice Day! Lohit -- Todd Lipcon Software Engineer, Cloudera

Re: Monitoring

-- i.e. I wouldn't bring it up on the public mailing list. That seems to be important information for not just the original poster but others who may have the same problem. What is the consensus on that? On Mon, Jul 25, 2011 at 11:45 AM, Todd Lipcon t...@cloudera.com wrote: Another answer

Re: Monitoring

could recommend that, too. I wouldn't have a problem with any of the above. -Todd On Mon, Jul 25, 2011 at 1:00 PM, Todd Lipcon t...@cloudera.com wrote: On Mon, Jul 25, 2011 at 11:55 AM, Ted Dunning tdunn...@maprtech.com wrote: Todd, Good to have you weigh in on this. You provide

Re: Monitoring

- From: Todd Lipcon t...@cloudera.com To: user@hbase.apache.org Cc: Sent: Monday, July 25, 2011 11:45 AM Subject: Re: Monitoring On Mon, Jul 25, 2011 at 11:28 AM, Ted Dunning tdunn...@maprtech.com wrote: I am very sympathetic here. Also, somewhat linguistically challenged

Re: Best way to Import data from Cassandra to HBase

In that, 't1', 'f1' is table and family in HBase. No data write in 'output' folder. Could you give me some advice? Thank you in advance. On Tue, Jun 14, 2011 at 10:44 AM, Todd Lipcon t...@cloudera.com wrote: On Mon, Jun 13, 2011 at 8:17 PM, King JKing beuk...@gmail.com wrote: Dear all

Re: Problem with importtsv on trsnferring data from HDFS to hbase table:

Program. -- Prashant Sharma Development Engineer Pramati Technologies Begumpet Hare Krishna -- Todd Lipcon Software Engineer, Cloudera

Re: Best way to Import data from Cassandra to HBase

completebulkload tool Sounds about right. I don't know what the .dbf format is, but if you can make an InputFormat that supports them, you can write a mapper to translate from those records into HBase Puts, and then use HFileOutputFormat and bulk loads just like ImportTsv. -Todd -- Todd Lipcon

Re: what is the recommended configuration in hbase to write big data

/property property namehbase.zookeeper.quorum/name valueserver1,serve3,server5/value /property cheers Byambajargal -- Todd Lipcon Software Engineer, Cloudera

Re: mslab enabled jvm crash

experience with JVMs up on CentOS 5.5. St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: mslab enabled jvm crash

On Wed, May 25, 2011 at 1:42 PM, Todd Lipcon t...@cloudera.com wrote: Hi Wayne, Looks like your RAM might be oversubscribed. Could you paste your hbase-site.xml and hbase-env.sh files? Also looks like you have some strange GC settings on (eg perm gen collection which we don't really need

Re: GC and High CPU

by the concurrent collector are run on machines with small numbers of processors (e.g., 1 or 2). [See http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html#icms ] Don't you have 2 processors per machine? St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: any performance results of transferring tera bytes from db to hbase?

in error, please notify us immediately by e-mail and delete the message and any attachments from your system. -- Todd Lipcon Software Engineer, Cloudera

Re: put to WAL and scan/get operation concurrency

by splitting regions and distributing them around multiple servers. If you have one super-hot row, it should fit in cache and give you some 20k reads/second. If you need more reads/sec on a single row than that, you'll need to add your own caching layer in front. -Todd -- Todd Lipcon Software Engineer

Re: one of our datanodes stops working after few hours

issue is that fsreads for RS get really slow when that happens). -Jack -- Todd Lipcon Software Engineer, Cloudera

Re: one of our datanodes stops working after few hours

wrote: my yourkit version expired :)... but here is the jstack when it happens: http://pastebin.com/5v6mHg3t On Mon, May 2, 2011 at 1:00 PM, Todd Lipcon t...@cloudera.com wrote: On Mon, May 2, 2011 at 12:56 PM, Jack Levin magn...@gmail.com wrote: Tried removing yourkit and run on javasun

Re: LoadIncrementalHFiles now deleting the hfiles?

prefer to have quicker access to the data in HBase. - Adam -- Todd Lipcon Software Engineer, Cloudera

Re: Help with NPE during bulk load (completebulkload)

in the doc (I'll do the rest). Thanks, St.Ack Read more... -- Todd Lipcon Software Engineer, Cloudera

Re: importtsv

. The importtsv program doesn't appear to be picking up mapred-site.xml, then. Are you sure it's valid XML? You can try xmllint to verify. Perhaps attach it here? -Todd Do you have suggestions for any other features/options that I should check? --- On Mon, 4/25/11, Todd Lipcon t...@cloudera.com wrote

Re: importtsv

: map 0% reduce 0% Apr 22, 2011 9:35:41 AM org.apache.hadoop.mapred.JobClient monitorAndPrintJob INFO: Job complete: job_local_0001 Apr 22, 2011 9:35:41 AM org.apache.hadoop.mapred.Counters log INFO: Counters: 0 Thanks, Eric -- Todd Lipcon Software Engineer, Cloudera

Re: apache hbase 0.90.2 vs CDH3 hbase0.90.1+15.18

continue to cherry-pick bug fixes back into the CDH3 version of HBase for our quarterly update releases (CDH3u1, CDH3u2, etc). -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: file is already being created by NN_Recovery

...@1and1.ro IM:diancu@united.domain -- Todd Lipcon Software Engineer, Cloudera

Re: ImportTsv usage

, Xiyun -- Todd Lipcon Software Engineer, Cloudera

Re: Yet another Hadoop 0.20-append query ... sorry

-tp31329123p31329123.html Sent from the HBase User mailing list archive at Nabble.com. -- Todd Lipcon Software Engineer, Cloudera

Re: LZO Compression changes in 0.90 ?

) at java.lang.Thread.run(Thread.java:680) Just want to make sure I'm not missing something before I start re-compiling those libs. -GS -- Todd Lipcon Software Engineer, Cloudera

Re: zookeeper-3.3.2 has default maxClientCnxns set to 10?

the task runs? St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: zookeeper-3.3.2 has default maxClientCnxns set to 10?

(Is 10 the default connections for zk?). Is it possible its not reading hbase-site.xml when the task runs? St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: zk connection leak with TableInput/OutputFormat (CDH3b4, 0.90.1)

to come up with a workaround against zookeeper connection leaks in HBase MR jobs. thank you very much. -Dmitriy -- Todd Lipcon Software Engineer, Cloudera

Re: CDH3B4 fixes permissions

now the hadoop.tmp.dir cannot be written. -geoff -- Todd Lipcon Software Engineer, Cloudera

Re: major hdfs issues

to iptables, what is the best way to disable? Generally haven't tuned tcp cookies. For iptables, it's usually enabled by some script in /etc/init.d - you can use chkconfig or update-rc.d to disable depending on OS. -Todd -Jack On Sat, Mar 12, 2011 at 8:24 PM, Todd Lipcon t...@cloudera.com

Re: major hdfs issues

and all regionservers went down, is this xciever issue? property namedfs.datanode.max.xcievers/name value12047/value /property this is what I have, should I set it higher? -Jack -- Todd Lipcon Software Engineer, Cloudera

Re: putting a border around 0.92 release

) -- Todd Lipcon Software Engineer, Cloudera

Re: Cluster Size/Node Density

Grey's recommendation. So there isn't a penalty incurred from increasing the max region size from 256MB to 5GB? -- Todd Lipcon Software Engineer, Cloudera

[ANN] HBase 0.90.1 available for download

The Apache HBase team is happy to announce the general availability of HBase 0.90.1, available from your Apache mirror of choice: http://www.apache.org/dyn/closer.cgi/hbase/ [at the time of this writing, not all mirrors have updated yet -- please pick a different mirror if your first choice does

Re: LZO Compression

in java.library.path My questions are 1. Are the two items I was given compatible? 2. If so, what could I be doing wrong? Thanks -Pete -- Todd Lipcon Software Engineer, Cloudera

Re: Region Servers Crashing during Random Reads

Thanks, Charan On Thu, Feb 3, 2011 at 10:22 PM, Todd Lipcon t...@cloudera.com wrote: Does the wiki really recommend that? Got a link handy? On Thu, Feb 3, 2011 at 10:20 PM, charan kumar charan.ku...@gmail.com wrote: Todd, That did the trick. I think the wiki should

Re: Exception reading from Hbase table with LZO compression

(HRegionServer.java:1765) ... 5 more -- Todd Lipcon Software Engineer, Cloudera

Re: Region Servers Crashing during Random Reads

:06 PM, Charan K charan.ku...@gmail.com wrote: Thanks Todd.. I will try it out .. On Feb 3, 2011, at 1:43 PM, Todd Lipcon t...@cloudera.com wrote: Hi Charan, Your GC settings are way off - 6m newsize will promote way too much to the oldgen. Try this: -XX

Re: Unresponsive master in Hbase 0.90.0

it somewhere I can pull? I'll try it over here. St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: Building LZO jar

] :: resolving dependencies :: com.hadoop.gplcompression#Hadoop-GPL-Compression;working@caiss01a [ivy:resolve] confs: [common] Would anyone have a pre-build 32bit LZO jar available? Thanks -Pete -- Todd Lipcon Software Engineer, Cloudera

Re: Cluster Wide Pauses

very frequently? Thanks in advance for any ideas of what could be causing this. -- Todd Lipcon Software Engineer, Cloudera

Re: Bulk upload an LZO compression

. This is important for us because we don't want to have a burst increase in our disk usage. Thanks and regards, - Ashish -- Todd Lipcon Software Engineer, Cloudera

Re: Java Commited Virtual Memory significally larged then Heap Memory

on any Sun or OpenJDK as far as I know. (Probably the wrong list for this, but: is there a officially supported JVM version for CDH3?) We recommend the Sun 1.6 =u16 but not u18 -Todd On 13 jan 2011, at 07:42, Todd Lipcon wrote: On Wed, Jan 12, 2011 at 5:01 PM, Tatsuya Kawano tatsuya6

Re: Ruby Bulk Load tool in 0.90

to the appropriate location, but the server assignment did not happen until I restarted HBase. Is this a consequence of the master rewrite? V -- Todd Lipcon Software Engineer, Cloudera

Re: Ruby Bulk Load tool in 0.90

to deal with ZK or META manually in any way, and if any of that stuff changes you'll be using a supported public API. -Todd On 1/13/11 10:30 AM, Todd Lipcon t...@cloudera.com wrote: Hey Vidhya, Nicolas actually did the multi-column-family patch for trunk a few weeks ago, so no need to upload

Re: Java Commited Virtual Memory significally larged then Heap Memory

fine. The problem is HBase LZO compression. The region server process is the one with the memory leak... (Sorry for dumb question Friso) But HBase is leaking because we make use of the Compression API in a manner that produces leaks? Thanks, St.Ack -- Todd Lipcon Software Engineer

Re: Java Commited Virtual Memory significally larged then Heap Memory

Can someone who is having this issue try checking out the following git branch and rebuilding LZO? https://github.com/toddlipcon/hadoop-lzo/tree/realloc This definitely stems one leak of a 64KB directbuffer on every reinit. -Todd On Wed, Jan 12, 2011 at 2:12 PM, Todd Lipcon t...@cloudera.com

Re: question about merge-join (or AND operator betwween colums)

column has 10 values at the bottom, we would end up scanning and filtering 0 records and throwing them away, which seems inefficient. Blooms+filters? St.Ack -- Todd Lipcon Software Engineer, Cloudera

Re: problem with LZO compressor on write only loads

, compactions and splits are quite common, though, because we do read-modify-write cycles a lot. Anyone else doing update heavy work with LZO? Cheers, Friso On 4 jan 2011, at 01:54, Todd Lipcon wrote: Fishy. Are your cells particularly large? Or have you tuned the HFile

Re: log reply failures, how to resolve

simply missing? Thanks. -Jack -- Todd Lipcon Software Engineer, Cloudera

Re: Bulk load using HFileOutputFormat.RecordWriter

directory has a only a _temporary directory with my outputs in each subdirectory. That doesn't seem be be what the loadtable script expects (a column family directory with HFiles). Can someone tell me if what I am doing makes sense in general or how to do this properly? Thanks! -- Todd Lipcon

Re: problem with LZO compressor on write only loads

large enough to make do? Having short lived direct byte buffers is apparently a discouraged practice. If anyone can provide some pointers on what to look out for, I could invest some time in creating a patch. Thanks, Friso -- Todd Lipcon Software Engineer, Cloudera

Re: CMF NodeIsDeadException

pauses are acceptable, go to 128m or larger. You can also tune SurvivorRatio down and use a larger new size for some workloads, but it's a little messy to figure this out. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: problem with LZO compressor on write only loads

ideas? Friso On 3 jan 2011, at 19:18, Todd Lipcon wrote: Hi Friso, Which OS are you running? Particularly, which version of glibc? Can you try running with the environment variable MALLOC_ARENA_MAX=1 set? Thanks -Todd On Mon, Jan 3, 2011 at 8:15 AM, Friso van Vollenhoven

Re: ImportTsv tool for v0.20.6?

why it wouldn't work for any case? Is there any architectural change that is necessary for these to work well that is not present in 0.20.6? Thanks, Hari -- Todd Lipcon Software Engineer, Cloudera

Re: Java Commited Virtual Memory significally larged then Heap Memory

swap space: 8 050 880 kbytes -- Todd Lipcon Software Engineer, Cloudera

Re: HBase Bulk Load script

FileOutputFormat.setCompressOutput/setOutputCompressorClass() on the Job; in order to turn on compression. Does that sound right? Marc On Thu, Dec 23, 2010 at 2:34 PM, Todd Lipcon t...@cloudera.com wrote: You beat me to it, Lars! Was writing a response when some family arrived for the holidays

PoweredBy

publicity and even help drive candidates if you're recruiting for teams that use HBase! The page is here: http://wiki.apache.org/hadoop/Hbase/PoweredBy Thanks. and happy holidays! -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: meta region cpu contention

[kswapd0] That server is dual-core, and great for natural region serving, but meta interaction implies a lot of fast transactions, which would be better served on 8 Core Box. -Jack -- Todd Lipcon Software Engineer, Cloudera

Re: Unresponsive yet functioning region server during bulk loads.

,1292936189782.714fc4e266abca11f578fd90a3561337. -- Todd Lipcon Software Engineer, Cloudera

Re: HBase Bulk Load script

to the local cluster first. -Todd -- Todd Lipcon Software Engineer, Cloudera

Re: provide a 0.20-append tarball?

. - Piet Hein (via Tom White) -- Todd Lipcon Software Engineer, Cloudera

Re: substantial performance degradation when using WAL

and clarification. I guess GC does blow (especially when writing things like databases and filesystems). Right now I will dive into GC tuning once more and probably lower the number of reducers on the insert jobs. Thanks, Friso -- Todd Lipcon Software Engineer, Cloudera

Re: HBase with trillions rows

with such number of rows are used with HBase? Thanks Alexey -- View this message in context: http://old.nabble.com/HBase-with-trillions-rows-tp30482335p30482335.html Sent from the HBase User mailing list archive at Nabble.com. -- Todd Lipcon Software Engineer, Cloudera

Re: Simple OOM crash?

, memstoreSize=33, compactionQueueSize=15, usedHeap=856, maxHeap=2198, blockCacheSize=366779472, blockCacheFree=87883088, blockCacheCount=5494, blockCacheHitRatio=0 2010-12-15 20:01:20,571 INFO org.apache.hadoop.ipc.HBaseServer: Stopping server on 60020 Thanks, Sandy -- Todd

Re: Simple OOM crash?

! -Original Message- From: Todd Lipcon [mailto:t...@cloudera.com] Sent: Friday, December 17, 2010 13:54 To: user@hbase.apache.org Subject: Re: Simple OOM crash? Hi Sandy, I've seen that error on github as well. Try using the git:// URL instead of the http:// URL. The http transport

Re: a couple of HBase issues

24 hours later.  They have a info:regioninfo column but no info:server.  Is there a way to force assignment of these regions? -- Todd Lipcon Software Engineer, Cloudera

Re: HBase stability

? Is it stable? Is it just us and the way we set it up? Also, would upgrading to 0.89 (cdh3b3) help? Thanks, Anze -- Todd Lipcon Software Engineer, Cloudera

Hackathon notes 12/13/2010

@ SU - Matthieu Lieber @ Datameer (building a connector) - Lars George - at Cloudera - writing HBase book - Gary Helmling @ Trend Micro - been working on coprocessors - Mingjie Lai @ Trend Micro - Todd Lipcon @ Cloudera - Joshua Ho @ Trend Micro - Eugene Koontz @ Trend Micro - working on ZK

Re: slow move from rdbm to hadoop/hbase(is there replication strategies for this?)

recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. -- Todd Lipcon Software Engineer

Re: Best Practices Adding Rows

and use that for Start/Stop. Thanks -Pete -- Todd Lipcon Software Engineer, Cloudera

Re: incremental counters and a global String-Long Dictionary

www.tis.bz.it. -- Todd Lipcon Software Engineer, Cloudera

Re: Garbage collection issues

has. Thanks so much! -Sean -- Todd Lipcon Software Engineer, Cloudera

Re: which HBase version to use?

release right now. And there is also the version that SU provides on githug, which has the advantage of being heavily used in a production environment by people who know what they're doing. Any advise on this anyone? Thanks, Friso -- Todd Lipcon

Re: which HBase version to use?

On Mon, Nov 22, 2010 at 3:44 PM, Andrew Purtell apurt...@apache.org wrote: On Mon, 11/22/10, Todd Lipcon t...@cloudera.com wrote: Once 0.90 is released, we plan on spending a week or two to suss out any possible integration issues, and then release CDH3b4 including 0.90. I'm sure

Re: Hadoop/HBase hardware requirement

(starting with 5). We already read http://www.cloudera.com/blog/2010/03/clouderas-support-team-shares-some-basic-hardware-recommendations/ . We would appreciate your feedback on our proposed configuration. Regards Oleg Lior -- Todd Lipcon Software Engineer, Cloudera

Re: hbase compression

supported that option, but in HBase 0.20.0 the new HFile format was developed which is always block based. Of course nothing stops you from storing compressed records if you see fit! HBase does fine with binary values. Thanks -Todd -- Todd Lipcon Software Engineer, Cloudera

  1   2   >