II. Freely Available Filesystem Backup & Recovery Utilities
by W. Curtis Preston
Unix Backup and Recovery
- Unix Backup and Recovery
- Preface
- I. Introduction
- 1. Preparing for the Worst
- 2. Backing It All Up
- Don’t Skip This Chapter!
- Why Should You Read This Book?
- How Serious Is Your Company About Backups?
- You Can Find a Balance
- Deciding What to Back Up
- Deciding When to Back Up
- Deciding How to Back Up
- Storing Your Backups
- Testing Your Backups
- Monitoring Your Backups
- Following Proper Development Procedures
- Unrelated Miscellanea
- Good Luck
- II. Freely Available Filesystem Backup & Recovery Utilities
- 3. Native Backup & Recovery Utilities
- An Overview
- Backing Up with the dump Utility
- Syntax of the dump Command
- The Options to the dump Command
- Option: specifying a complete or incremental backup (0-9)
- Option: specifying a blocking factor (b)
- Option: updating the dumpdates file (u)
- Option: notifying your backup operators (n)
- Option: specifying density and size ( d and s)
- Do I have to use the s and d options?
- Option: specifying a backup device file ( f )
- Option: displaying which filesystems need to be backed up (W and w)
- Other options: interesting options for Solaris’s ufsdump utility
- What a dump Backup Looks Like
- Automating Your dump Backups: The hostdump.sh Utility
- Restoring with the restore Utility
- Is the Backup Volume Readable?
- Blocking Factor
- Byte-Order Differences
- Different Versions of dump
- Syntax of the restore Command
- The Options to the restore Command
- Determining the type of restore
- Determining how the restore behaves
- Option: creating a dump volume table of contents (t)
- Option: performing a complete (recursive) filesystem restore (r)
- Option: restoring files by name (x)
- Option: restoring files interactively (i)
- Option: restoring files to another location
- Option: requesting verbose output (v)
- Option: skipping files (s)
- Option: specifying a blocking factor ( b )
- Option: specifying a backup drive or file ( f )
- Option: specifying no query during restore ( y)
- Limitations of dump and restore
- Features to Check For
- Backing Up and Restoring with the cpio Utility
- Syntax of cpio When Backing Up
- The Options to the cpio Command
- Option: specifying the output mode (o)
- Option: restoring access times (a)
- Option: specifying the ASCII format (c)
- Option: requesting verbose output (v)
- Option: specifying a blocking factor of 5120 (B)
- Option: specifying an I/O block size (C)
- Option: Specifying an output device or file (O)
- Backing up to a remote device (piping to an rsh command)
- Restoring with cpio
- cpio’s Restore Options
- Telling cpio Which Device to Use
- Examples of a cpio Restore
- Using cpio’s “Directory Copy” Feature
- Backing Up and Restoring with the tar Utility
- Backing Up and Restoring with the dd Utility
- Comparing tar, cpio, and dump
- How Do I Read This Volume?
- 4. Free Backup Utilities
- The hostdump.sh Utility
- The infback.sh, oraback.sh, and syback.sh Utilities
- A Really Fast tar Utility: star
- Recording Configuration Data: The SysAudit Utility
- Displaying Host Information: The SysInfo Utility
- Performing Remote Detections: The queso Utility
- Mapping Your Network: The nmap Utility
- AMANDA
- AMANDA Features
- Future Capabilities of AMANDA
- AMANDA Resources
- Installing AMANDA
- Configuring AMANDA
- Decide on a tape server
- Decide which tape devices to use
- Decide whether to use compression
- Decide where the holding space will be
- Compute your dump cycle
- Copy and edit the default configuration file
- Configure the holding disk
- Configure tape devices and label tapes
- Configure backup clients
- Test and debug setup
- Operating AMANDA
- Advanced AMANDA Configuration
- Restoring with AMANDA
- Configuring and using amrecover
- Using amrestore
- Restoring without AMANDA
- III. Commercial Filesystem Backup & Recovery Utilities
- 5. Commercial Backup Utilities
- What to Look For
- Full Support of Your Platforms
- Backup of Raw Partitions
- Backup of Very Large Filesystems and Files
- Simultaneous Backup of Many Clients to One Drive
- Simultaneous Backup of One Client to Many Drives
- Data Requiring Special Treatment
- Storage Management Features
- Reduction in Network Traffic
- Support of a Standard or Custom Backup Format
- Ease of Administration
- Security
- Ease of Recovery
- Protection of the Backup Index
- Robustness
- Automation
- Volume Verification
- Cost
- Vendor
- Conclusions
- 6. High Availability
- 5. Commercial Backup Utilities
- IV. Bare-Metal Backup & Recovery Methods
- V. Database Backup & Recovery
- 13. Backing Up Databases
- Can It Be Done?
- Confusion: The Mysteries of Database Architecture
- The Muck Stops Here: Databases in Plain English
- What’s the Big Deal?
- Database Structure
- An Overview of a Page Change
- What Can Happen to an RDBMS?
- Backing Up an RDBMS
- Restoring an RDBMS
- Documentation and Testing
- Unique Database Requirements
- 14. Informix Backup & Recovery
- Informix Architecture
- Automating Informix Startup: The dbstart.informix.sh Script
- Protect the Physical Log, Logical Log, and sysmaster
- Which Backup Utility Should I Use?
- Physical Backups Without a Storage Manager: ontape
- Configuring ontape
- Tape or Disk?
- Backing Up the Instance
- Backing Up the Logical Logs
- Automating Archives with ontape: the infback.sh Utility
- Why automating ontape is difficult
- How infback.sh works
- When infback.sh runs
- If infback.sh is called with no arguments
- If infback.sh is called with arguments specifying backup parameters
- If infback.sh is called with at as the first argument
- The backup begins
- Installing infback.sh and its configuration files
- Editing the infback.sh configuration files
- Centralized configuration
- Scheduling backups
- Why Automating Continuous Backups Is Difficult
- Automating Continuous Backups: the rclogs.sh Utility
- Using the Scripts Together
- Physical Backups with a Storage Manager: onbar
- Recovering Informix
- Step 1: Does oninit Work?
- Step 2: Is the onconfig File Missing?
- Step 3: Restore or Re-create the onconfig File
- Step 4: Is There an Inaccessible or Critical Chunk?
- Step 5: Repair or Replace the Missing Chunk
- Step 6: Performing a Cold Restore
- Step 7: Are There Errors in the Online Log?
- Step 8: Is There an Inaccessible Noncritical Chunk?
- Step 9: Is There a Corrupted Noncritical Chunk?
- Step 10: Perform a dbspace Restore
- Step 11: Are There Wrong Values in the onconfig File?
- Step 12: Change the Bad Values in the onconfig File
- Step 13: Ensuring That the Instance Will Restart
- Step 14: Taking the Instance Offline
- Step 15: Confirming That dbspaces and Chunks Are Online
- Step 16: Recovering a Deleted Table or Database
- Step 17: Performing a Point-in-Time Restore
- Step 18: Is Everything OK?
- Step 19: Making a Backup
- Logical Backups
- 15. Oracle Backup & Recovery
- Oracle Architecture
- Physical Backups Without a Storage Manager
- Physical Backups with a Storage Manager
- Managing the Archived Redologs
- Recovering Oracle
- Using This Recovery Guide
- Step 1: Try Startup Mount
- Step 2: Are All Control Files Missing?
- Step 3: Replace Missing Control File
- Step 4: Are All Datafiles and Redologs OK?
- Step 5: Recover Damaged Datafiles or Redologs
- Step 6: Is There a create controlfile Script?
- Step 7: Run the create controlfile Script
- Step 8: Restore Control Files and Prepare the Database for Recovery
- Step 9: Recover the Database
- Step 10: Does “alter database open” Work?
- Step 11: Damaged System File?
- Step 12: Restore All Datafiles in the SYSTEM Tablespace
- Step 13: Damaged Nonsystem Datafile?
- Step 14: Take Damaged Datafile Offline
- Step 15: Were Any Datafiles Taken Offline?
- Step 16: Bring Datafile(s) Back Online
- Step 17: Is There a Damaged Log Group?
- Step 18: Are Any Rollback Segments Unavailable?
- Step 19: Does the Database Need to Be at Least Partially Up ASAP?
- Step 20: Recover Tablespace Containing Unavailable Rollback Segment
- Step 21: Comment Out Rollback Segment Line(s) in the init.ora File
- Step 22: Is the Current Online Log Damaged?
- Step 23: Recover All Database Files from Backup
- Step 24: alter database open resetlogs
- Step 25: Is an Active Online Redolog Damaged?
- Step 26: Perform a Checkpoint
- Step 27: Is an Inactive Online Redolog Damaged?
- Step 28: Drop/Add a Damaged, INACTIVE Log Group
- Step 29: Were Any Rollback SegmentLines Changed in init.ora?
- Step 30: Return Offline Rollback Segments to Normal Condition
- You’re Done!
- Logical Backups
- A Broken Record
- 16. Sybase Backup & Recovery
- Sybase Architecture
- Physical Backups Without a Storage Manager
- Physical Backups with a Storage Manager
- Recovering Sybase
- Restoring from a Cold Backup
- Restoring from a Hot Backup
- Using the Recovery Procedure
- Step 1: Runfile OK?
- Step 2: Restore or Re-create Runfile
- Step 3: Able to Get Shared Memory?
- Step 4: Free Up Shared Memory or Reconfigure Memory in Configuration File
- Step 5: Able to Connect to Data Server?
- Step 6: Check Interface File
- Step 7: Master Database Initialized?
- Step 8: Master Device/File Missing?
- Step 9: Restoring Generic Master Database
- Step 10: Recent Dump of Master Database?
- Step 11: Restore Master from Dump
- Step 12: Update Number of Devices in the Configuration
- Step 13: Restore System Tables Using disk reinit and disk refit
- Step 14: sybsystemprocs Available?
- Step 15: Problem with Data Devices?
- Step 16: Replace Device/Disk File
- Step 17: Restore Base sybsystemprocs from sybsystemprocs Script
- Step 18: Recent Dump of Database?
- Step 19: Restore from Dump
- Step 20: Is tempdb Available?
- Step 21: Model Database Available?
- Step 22: Re-create Generic Model Database
- Step 23: All Databases Online?
- Step 24: Contact Sybase Support
- Step 25: Reapply Any Additional Scripts or bcps
- Step 26: Review Against Hardcopies
- Step 27: Dump all Restored Databases
- Logical Backups
- An Ounce of Prevention . . .
- 13. Backing Up Databases
- VI. Backup & Recovery Potpourri
- 17. ClearCase Backup & Recovery
- 18. Backup Hardware
- Choosing on a Backup Drive
- Using Backup Hardware
- Tape Drives
- Linear Versus Helical Scan
- Cartridges Versus Cassettes
- Tape Drive Technologies
- 3480/3490/3490E drives
- 8-mm drives
- AIT drive
- Ampex DST drive
- DDS drive
- The DLT drive
- Exabyte Mammoth drive
- IBM Magstar MP (3570) drive
- IBM Magstar 3590 drive
- LTO drive
- Metrum line of drives
- Plasmon LMS NCTP drive
- Sony DTF drive
- The Storagetek 9840 (Eagle) drive
- The Storagetek Redwood SD-3 drive
- The Tandberg MLR 1-3 drive
- Optical Drives
- Automated Backup Hardware
- Vendors
- Hardware Comparison
- 19. Miscellanea
- Index
- Colophon
- 3. Native Backup & Recovery Utilities
-
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