C11-101 101 ( )
1
15 2000 20%
20MB 170000 19
7% 3% 14% 32% 44% Disaster Recovery Journal
( ) UPS
- (Fault Tolerance Capability) (Avoid Single point of failure) (High Availability)
(RAID) (Cluster) (Backup)
(RAID) ( (RAID) (1/2) 1987 (RAID Redundant Array of Independent (or Inexpensive) Disks) RAID
(RAID) ( (RAID) (2/2) RAID
(Spare Drive) (1/2( 1/2)
(Spare Drive) (2/2( 2/2) Local Global
RAID 0 RAID 1 RAID 2 RAID 3 RAID 4 RAID 5 RAID 10 01 RAID 6 RAID Striped Volume N 2 (Mirror) N/2 2 N-1 Byte-level Hamming Code Parity Byte-level Parity N-1 3 N-1 Block-level Parity Striped Volume with Distributed (Interleave) Parity N-1 Second parity data N-2 4 N/2 3 3 3 4
RAID 1 1 RAID 5 Block 1 Block 3 Block 4 Block 1 Block 2 Block 4 Block 1 Block 4 Block 2 Parity 3-4 Parity 5-6 Block 5 Block 6 Block 7 Block 8 Parity 1-2 Block 3 Parity 7-8
(Clustering) (two node failover) -- (Load Balance)
(failover) IP Database File System IP Address Network Card Volumes Physical Physical Disk Physical Disk Disk IP (Mirror)
2
(Backup Policy)
2 -
(How Often) (What Time) (How Long)
(Diskette) (Tape) (Hard Drive) (CD-R / CR-RW / DVD) (Others )
(1/2) (Helical Scan) 90 (Video Technology) SONY AIT, S-AIT Exabyte 8MM, Mammoth, Mammoth-2 Seagate, HP DDS 1-4(4MM)
(2/2) (Linear Tape) Quantum VS, DLT, SDLT LTO Consortium LTO Ultrium 1,2,3 Storage Technology 9840B, 9940B IBM 3590 Various Travan, QIC
LTO(Linear Tape-Open ) LTO Ultrium(HP IBM Seagate) DLT(Digital Linear Tape) Super DLT (Quantum Corporation) AIT (Advanced Intelligent Tape) SAIT(Sony) DDS (HP Sony) Mammoth (IBM)
2 -
(On-Line Backup) (Off-Line Backup)
(Full Backup) (Incremental Backup) (archive bit ) (Differential Backup)
2 -
(Tape Rotation Scheme) (Six-Tape Rotation) (Grandfather-Father-Son GFS) (Tower of HANOI)
(Six (Six-Tape Rotation) FRI1 FRI2 MON TUE WED THU FRI1 FRI2 FRI1 MON MON MON MON TUE TUE TUE TUE WED WED WED WED THU THU THU THU FRI1 FRI2 FRI1 FRI2 FRI1
(1/3) (Grandfather-Father-Son ) (Son) (Father) (Grandfather) 20 4 MON TUE WED THU 4 WEEK1 WEEK4 12 MONTH1 MONTH12 38
(2/3) Week1 Week2 MONTH1 39
(3/3) MON MON MON MON TUE TUE TUE TUE WED WED WED WED THU THU THU THU WEEK1 WEEK2 WEEK3 WEEK4 MONTH1
(1/2) (Tower of HANOI) A B C D E A B C D E
(2/2) (2/2) E 16 A 15 B 14 A 13 C 12 A 11 B 10 A 9 D 8 A 7 B 6 A 5 C 4 A 3 B 2 A 1 (Tape Set Used) (Backup Session) A D A B A C A B A E A B A C A B A D A B A C A B A
(Six-Tape Rotation) (Grandfather- Father-Son) (Tower of HANOI) GFS
2 -
(Backup Topology) LAN SAN DAS NAS SAN
1. 1. 2. 2.
LAN 1. 1. LAN 2. 2.
SAN 1. LAN free Serverless 2. 3. LAN 4. : 1. 2. SAN ( FC iscsi) LAN
3
Enterprise Storage group
(Backup Windows) Cartridge System Tape
SAN iscsi
(backup log) (read verify)
(1/2) (on-site) (Off-site)
(2/2)
4
(BCP) (DRP)
(Business Continuity Planning BCP) (Disaster Recovery Planning DRP)
(Recovery Time Objective) (Recovery Point Objective) RPO=0 RPO RTO
(Remote Backup)
(Electronic vaulting) (bulk transfer of backup files) (Remote journaling) (1) (2) (Database Shadowing)
Data Data Data Data Data Data Data Data
DRP (Hot Site) Hot Site (Warm Site) Warm Site ( ) (Cold Site) Cold Site
RTO/RPO