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Title:

Storage Management

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Storage Management Or How LSS of WI Came to Use iSCSI Presenter: Scott Wolski What I m hoping to cover Why address Storage Management? Traditional storage problems ... – PowerPoint PPT presentation

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Date added: 3 October 2019
Slides: 19
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Title: Storage Management


1
Storage Management
  • Or How LSS of WI Came to Use iSCSI
  • Presenter Scott Wolski

2
What Im hoping to cover
  • Why address Storage Management?
  • Traditional storage problems
  • Storage technologies
  • LSS of WIs SAN project
  • Live SAN demo

3
Storage as a growing concern
  • Growth of data
  • Under normal business, the size of enterprise
    data doubles every 12-18 months

4
Storage as a growing concern
  • Growth of data
  • Increased retention and recovery needs
  • HIPAA and Sarbanes-Oxley data retention
    requirements
  • Business and users driving more retention (more,
    faster, better)

5
Storage as a growing concern
  • Growth of data
  • Increased retention and recovery needs
  • Increased availability needs
  • IT systems are integral to day-to-day business
  • Downtime has a greater impact

6
Storage as a growing concern
  • Growth of data
  • Increased retention and recovery needs
  • Increased availability needs
  • Shrinking IT budgets
  • Expectations of doing more with less
  • More efficient use of resources needed
  • More efficient use of staff needed

7
Typical Datacenter growth (or at least how things
used to work at LSS of WI)
  • Business demands call for a new IT system
  • Options are researched and the best software is
    chosen
  • Server is speced to meet software requirements
    and anticipated data growth
  • System is deployed and 3 things tend to happen
  • System works as anticipated for life of the
    server Good job!
  • Growth doesnt meet expectations and excess
    server resources go wasted
  • Growth exceeds expectations and server runs low
    on hard drive space
  • New hard drives can be ordered to expand storage
  • New server can be ordered to get a faster box
    with more storage

8
Typical Datacenter growth (or at least how things
used to work at LSS of WI)
  • Problems with this model
  • A lot of unused storage resources
  • Businesses are unusually overly optimistic about
    their efficiency
  • 70 self-reported efficiency vs. 45 actual
    efficiency
  • Wasted time migrating data
  • Even on a 3 year life-cycle, 15 of 45 servers
    will be replaced a year
  • Servers with unexpected growth increase this
    number
  • Migrations usually involve downtime to move
    applications and data
  • Monitoring of resources is time consuming to do
    manually
  • Very little flexibility

9
Storage Technologies
  • DAS Direct Attached Storage
  • NAS Network Attached Storage
  • ED Enterprise Disk
  • SAN Storage Area Network

10
Storage Technologies
  • Direct Attached Storage (DAS)
  • Usually SCSI
  • Speed and redundancy usually provided via RAID
  • Pros
  • Hard drive prices are fairly cheap
  • Simple to manage
  • Cons
  • Backups typically over LAN
  • Geographically distributed
  • Limited scalability

11
Storage Technologies
  • Network Attached Storage (NAS)
  • OS streamlined to provide file access to shared
    storage
  • Serves files using standard access protocols
    (NFS, CIFS, Samba, etc.)
  • Pros
  • Centralizes most data storage
  • Uses standard protocols
  • Simple to manage
  • Cons
  • Data transfers are at LAN speed
  • Scalability can be limited

12
Storage Technologies
  • Enterprise Disk (ED)
  • Provides low-level access to block storage
  • Disk array similar to SAN
  • Often a building-block to a SAN
  • Pros
  • LAN traffic offloaded
  • Very reliable disk subsystem
  • Allows for data replication
  • Allows for multi-node clusters
  • Can centralize all data storage
  • Cons
  • Moderately expensive
  • Limited scalability

13
Storage Technologies
  • Storage Area Network (SAN)
  • Provides low-level access to block storage
  • Network for attaching storage devices to servers
  • Pros
  • Same benefits as ED
  • Redundancy can be easily integrated to network
    design
  • Extremely scalable
  • File systems can be shared
  • Cons
  • Most expensive
  • Can be more difficult to manage

14
Storage Technologies
  • More about SANs
  • Fibre Channel (FC) vs. iSCSI
  • FC vs. SATA
  • Main players
  • EMC, Equallogic, IBM, HP, Brocade, Qlogic, Onaro,
    Open source
  • Infrastructure Switches, HBAs, Bandwidth, etc.
  • Management LUNs, snapshots, backups

15
LSS of WIs SAN project
  • Drivers
  • Inefficient use of space
  • Web servers with gigs of unused space
  • File server running low on space
  • Server rebuilds, data migrations slow
  • Desire for a long-term data storage solution
    instead of one-off solutions

16
LSS of WIs SAN project
  • Research and RFPs presented 3 main options
  • EMC
  • Equallogic
  • Netapp
  • Each were generally regarded as solid storage
    solutions
  • Deciding factors
  • FC vs. iSCSI
  • Ease of management
  • Positive references from parallel businesses

17
LSS of WIs SAN project
  • Equallogic
  • iSCSI, 12 SATA drives, 2.5TB
  • 20 minute SAN
  • No extra licensing fees (unlimited connections,
    volumes, snapshots, replication)
  • Easy expansion

18
LSS of WIs SAN project
  • Current use
  • 7 live volumes (488GB, 22)
  • Snapshots schedules, backup to tape
  • Replication to 1.25TB unit in DR site
  • Demo
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