Distributed Computing.
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- Liliana Shepherd
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1 Distributed Computing at
2 About: Me ME
3 About: Me ME 09 Tech grad B.S. Computer Engineering 4 years at rackspace
4 About: Rackspace
5 About: Rackspace Managed + Cloud hosting Cloud Applications:
6 About: Rackspace Office in Blacksburg 100 best companies to work for We re hiring!
7 The Big Picture Data is VALUABLE Data is growing More sources + more data per source Faster than individual devices Years of information
8 The Big Picture: Rackspace At Rackspace 2.5 Million mailboxes Million messages / day GB raw log data / day Hundreds of servers TBs of stored log data
9 The Big Picture: Rackspace How do we Aggregate Store Analyze Access
10 The Big Picture: Rackspace How do we Get Value?
11 The Problem With mail logs, we can: Help customers Diagnose the system Understand and plan
12 Aggregation Multi-Source Single-Sink Realworld network Hardware Failure
13 Storage Distributed Fault tolerant Horizontally scalable Easy
14 Serving Logs Make logs accessible for: Support to help customers Operations to diagnose errors
15 Serving Logs The challenge: Volume 400+ GB / day = 300 MB / min Must be timely Related log data may be disjoint
16 Serving Logs + Index data with Hadoop MapReduce Serve indexes in Solr
17 Serving Logs: Indexing Map Reduce: History on distributed systems: Google Easily distributed Map step: key->value pair Reduce step: All values for a key
18 Serving Logs: Indexing Map Reduce for mail logs: Map step: Parse raw log Reduce step: Aggregate related log lines Generate relevant structure for queries Output as Solr index
19 Serving Logs: Indexing Nov 12 17:36:54 gate8.gate.sat.mlsrvr.com postfix/smtpd[2552]: connect from hostname Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/qmgr[9489]: 1DBD21B48AE: size=5950, nrcpt=1 (queue active) Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/smtpd[28085]: disconnect from hostname Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/smtpd[22593]: too many errors after DATA from hostname Nov 12 17:36:54 gate2.gate.sat.mlsrvr.com postfix/smtp[15928]: ED: relay=hostname[ip], conn_use=2, delay=0.69, delays=0.04/0.44/0.04/0.17, dsn=2.0.0, status=sent ( Ok: queued as 02E1544C005) Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/smtpd[22593]: disconnect from hostnamenov 12 17:36:54 gate10.gate.sat.mlsrvr.com postfix/smtpd[10311]: connect from hostname Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/smtp[28107]: D42001B48B5: relay=hostname[ip], delay=0.32, delays=0.28/0/0/0.04, dsn=2.0.0, status=sent ( Ok: queued as 1DBD21B48AE) Nov 12 17:36:54 gate20.gate.sat.mlsrvr.com postfix/smtpd[27168]: disconnect from hostname Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/qmgr[1209]: A0224: removed Nov 12 17:36:54 gate2.gate.sat.mlsrvr.com postfix/qmgr[13764]: ED: removed Nov 12 17:36:54 gate1.gate.sat.mlsrvr.com postfix/smtpd[26394]: NOQUEUE: reject: RCPT from hostname Client host rejected: The sender's mail server is blocked; proto=esmtp
20 Serving Logs: Indexing Nov 12 17:36:54 gate8.gate.sat.mlsrvr.com postfix/smtpd[2552]: connect from hostname Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/qmgr[9489]: 1DBD21B48AE: size=5950, nrcpt=1 (queue active) Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/smtpd[28085]: disconnect from hostname Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/smtpd[22593]: too many errors after DATA from hostname Nov 12 17:36:54 gate2.gate.sat.mlsrvr.com postfix/smtp[15928]: ED: relay=hostname[ip], conn_use=2, delay=0.69, delays=0.04/0.44/0.04/0.17, dsn=2.0.0, status=sent ( Ok: queued as 02E1544C005) Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/smtpd[22593]: disconnect from hostnamenov 12 17:36:54 gate10.gate.sat.mlsrvr.com postfix/smtpd[10311]: connect from hostname Nov 12 17:36:54 relay2.relay.sat.mlsrvr.com postfix/smtp[28107]: D42001B48B5: relay=hostname[ip], delay=0.32, delays=0.28/0/0/0.04, dsn=2.0.0, status=sent ( Ok: queued as 1DBD21B48AE) Nov 12 17:36:54 gate20.gate.sat.mlsrvr.com postfix/smtpd[27168]: disconnect from hostname Nov 12 17:36:54 gate5.gate.sat.mlsrvr.com postfix/qmgr[1209]: A0224: removed Nov 12 17:36:54 gate2.gate.sat.mlsrvr.com postfix/qmgr[13764]: ED: removed Nov 12 17:36:54 gate1.gate.sat.mlsrvr.com postfix/smtpd[26394]: NOQUEUE: reject: RCPT from hostname Client host rejected: The sender's mail server is blocked; proto=esmtp
21 Serving Logs: Searching Full text search + advanced search features Supports distributed operation Horizontally scalable
22 Serving Logs: Searching Our Solr cluster: Separate from hadoop Pulls indexed data and merges into memory Subset of logs searchable Shard data based on time
23 Analytics Hadoop Map Reduce Large sets of data 100s of GBs per job; potentially TBs Full power of Map Reduce Hadoop Streaming
24 Challenges Building on top of HDFS Easy, but simple Custom organization on top of filesystem
25 Challenges In Flight Refactor Original design assumed perfect information Redesign around delayed logs/events
26 Challenges Parsing Application Logs Requires Domain Knowledge Develop services based on distributed systems for solutions to use rather than solutions build around technology
27 The Future Streaming vs Batching Solr Cloud New Logging solution
28 Takeaway Use of Hadoop + Map Reduce to solve our data problem Solutions must be created to extract value from growing data Example of a realworld distributed system
29 Distributed Systems Big Data is only one of the areas of growth in distributed systems We need YOU RackerTalent.com
30 Resources lucene.apache.org/solr hadoop.apache.org Hadoop: The Definitive Guide
Topics. Big Data Analytics What is and Why Hadoop? Comparison to other technologies Hadoop architecture Hadoop ecosystem Hadoop usage examples
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