HA(High Availability, °í°¡¿ë¼º) ±â´É ¼³¸í
ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É - Automatic Fail Over (AFO)
´ÙÁß ¿î¿µ ¼¹öÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É
MSCSÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É
NASÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É
¿ø°ÝÁö»óÀÇ ÀÚµ¿ Àå¾Ö
º¹±¸ ±â´É
Multi-tier ÄÄÇ»ÆÃÀÇ ÀÚµ¿ Àå¾Ö º¹±¸
Double-Take
±¸¼º ¸ðµ¨: HA/DR ¸ðµ¨
ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É - Automatic Fail Over (AFO)
Target Node´Â ½Ç½Ã°£À¸·Î Source NodeÀÇ Àå¾Ö(Down) ¿©ºÎ¸¦ °¨ÁöÇÕ´Ï´Ù.
Target Node´Â Source Node Àå¾Ö ½Ã Source NodeÀÇ Network Name°ú Address¸¦
ÀÚµ¿À¸·Î ȹµæÇÏ°í Source Node¿¡¼ Real-TimeÀ¸·Î BackupµÈ µ¥ÀÌÅ͸¦ ÀÌ¿ëÇÏ¿©
»ç¿ëÀڵ鿡°Ô µ¿ÀÏÇÑ ¼ºñ½º¸¦ °è¼Ó Á¦°øÇÕ´Ï´Ù.
À̶§ Target Node´Â Target Node¿Í Source NodeÀÇ Network Á¤º¸¸¦ µ¿½Ã¿¡
À¯ÁöÇϸç, Target Node¿¡¼ ¿î¿µµÇ´Â Application°ú Source Node¿¡¼ ÀÌÀüµÈ
ApplicationÀ» µ¿½Ã¿¡ ½ÇÇàÇÕ´Ï´Ù.
¡¡
- Source NodeÀ» ÀÌ¿ëÁßÀÎ Client PC »ç¿ëÀÚ´Â Source Node Àå¾Ö½Ã
Target Node¿¡ À翬°áµÇ¾î ÀÛ¾÷À» °è¼Ó ÁøÇàÇÕ´Ï´Ù.
Source Node¿¡¼ °øÀ¯ µð·ºÅ͸®¸¦ Target Node·Î Real-Time Backup ÇÒ
¶§ Source Node Àå¾Ö ½Ã Target Node¿¡¼ µ¿ÀÏÇÑ °øÀ¯ µð·ºÅ͸® ¼ºñ½º¸¦
Client »ç¿ëÀÚ¿¡°Ô Á¦°øÇÕ´Ï´Ù.
Source NodeÀÇ Exchange Mail, RDB ¼¹ö, Web ¼¹ö µîÀÇ ¼ºñ½º°¡
Source Node Àå¾Ö ½Ã Target Node·Î ¼ºñ½º°¡ ÀÚµ¿ Fail OverµÇ¾î Client¿¡°Ô
°è¼Ó ¼ºñ½º¸¦ Á¦°øÇÕ´Ï´Ù.
Fail Over´Â ÁöÁ¤µÈ ¼ºñ½º¿¡ ´ëÇÑ Pre-Failover Script ÆÄÀÏ°ú Post-Failover
Script ÆÄÀÏÀ» Double-Take Fail Over Monitor ¼ºñ½º°¡ ½ÇÇàÇÏ¿© ÇØ´ç ¼ºñ½º¸¦
´Ù½Ã½ÃÀÛ ÇÕ´Ï´Ù.
´ÙÁß ¿î¿µ ¼¹öÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É - Multiple Automatic Fail Over (AFO)
ÇÑ °³ÀÇ Target Node´Â µ¿½Ã¿¡ 50´ëÀÇ ¿î¿µ¼¹ö¿¡ ´ëÇÏ¿© ÀÚµ¿
Àå¾Ö º¹±¸(Failover) ¼ºñ½º¸¦ Áö¿øÇÕ´Ï´Ù.
µÎ °³ ÀÌ»óÀÇ Source Node¿¡ ´ëÇÏ¿© Target Node°¡ µ¿½Ã¿¡ Fail Over
¼ºñ½º¸¦ Áö¿øÇϱâ À§Çؼ´Â Target NodeÀÇ ¼¹ö ¿ë·®ÀÌ »ó´ëÀûÀ¸·Î ´ë¿ë·®À̾î¾ß
ÇÕ´Ï´Ù.¡¡
MSCSÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É
- MSCS(Microsoft Cluster Server)¸¦ À§ÇÑ Double-Take ±¸¼º
- MSCS Àüü Àå¾Ö ½Ã MSCS¿¡¼ ¼öÇàµÇ´Â ¸ðµç ¾÷¹«°¡ Àå¾Ö º¹±¸µË´Ï´Ù.
¡¡
NASÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É
´õºíÅ×ÀÌÅ©´Â LAN ¹× WAN »ó¿¡¼ NAS-to-NAS °£ÀÇ ½Ç½Ã°£ ¹é¾÷À» ¼öÇàÇÏ¿©
NAS ¼¹öÀÇ ÀçÇغ¹±¸ ȯ°æÀ» °£´ÜÇÏ°Ô ±¸ÃàÇÒ ¼ö ÀÖ½À´Ï´Ù.
¿î¿µÁßÀÎ NAS ¼¹ö¿¡¼ Àå¾Ö°¡ ¹ß»ýÇÏ¸é ¹é¾÷ NAS ¼¹ö¿¡¼ 1ºÐ À̳»¿¡
NAS ¼ºñ½º¸¦ ÀÚµ¿ º¹±¸ÇÏ¿© ÁÝ´Ï´Ù.
Target NAS´Â Àå¾Ö ¹ß»ýÇÑ Source NASÀÇ ³×Æ®¿öÅ© Á¤º¸¸¦ ÀÚµ¿À¸·Î ȹµæÇÏ¿©
Source NASÀÇ ¼ºñ½º¸¦ NAS »ç¿ëÀڵ鿡°Ô µ¿ÀÏÇÏ°Ô Á¦°øÇÕ´Ï´Ù.
IBM, Compaq ¹× Dell ÄÄÇ»ÅÍ¿¡¼ °ø±ÞÇÏ´Â NAS Àåºñ ¿¡´Â ´õºíÅ×ÀÌÅ©
Æò°¡¹öÀü ¶óÀ̼¾½º°¡ ÆÐÅ°Áö·Î ÇÔ²² °ø±ÞµË´Ï´Ù.
NAS µ¥ÀÌÅÍÀÇ ½Ç½Ã°£ ¹é¾÷Àº ´õºíÅ×ÀÌÅ©°¡ ¾÷°è Ç¥ÁØÀÔ´Ï´Ù.
¿ø°ÝÁö»óÀÇ ÀÚµ¿ Àå¾Ö º¹±¸ ±â´É - Offsite WAN Automatic Fail Over (AFO)
Multi-tier ÄÄÇ»ÆÃÀÇ ÀÚµ¿ Àå¾Ö º¹±¸
- Multi-tier ÄÄÇ»ÆÃÀÇ ¼¹öµé¿¡ ´ëÇÑ ´õºíÅ×ÀÌÅ©ÀÇ ±¸¼º(¿¹: Web Site)
Double-Take
±¸¼º ¸ðµ¨: HA/DR ¸ðµ¨
- Double-TakeÀÇ On-Site ¼¹ö¿Í Off-Site ¼¹ö ±¸¼º ¿¹
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- ¹Ì±¹ ƯÇã±â¼úÀÎ Double-TakeÀÇ ¼¹ö ¸ðµâÀº ¼¹ö ½Ã½ºÅÛ Ã³¸®¼Óµµ¿¡
¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê½À´Ï´Ù.
- Double-Take´Â ±âÁ¸ÀÇ TCP/IP ³×Æ®¿öÅ©
±¸¼ºÀ» ÀÌ¿ëÇÕ´Ï´Ù. º°µµÀÇ Çϵå¿þ¾î°¡ ÇÊ¿ä ¾ø½À´Ï´Ù.
- Production
Server ´ë½Å¿¡, Áß¾ÓÀÇ Target Node¿¡¼ Data BackupÀ» ¹ÞÀ½À¸·Î½á
Backup ÀåÄ¡ ±¸ÀÔ ºñ¿ë Àý°¨°ú ¿ëÀÌÇÑ Backup ÀÛ¾÷À» ÇÒ ¼ö ÀÖ½À´Ï´Ù.
- Double-Take´Â ¹é¾÷ Àü¼ÛÀ» À§ÇÑ ´ë¿ªÆøÀ» Á¶ÀýÇÏ¿© »ç¿ëÇÒ
¼ö ÀÖ¾î¼ WAN°ú °°Àº Åë½Å ȯ°æ¿¡¼µµ Ź¿ùÇÑ ½Ç½Ã°£ ¹é¾÷À» ¼öÇàÇÕ´Ï´Ù.
- Double-TakeÀÇ Target ¸ðµâÀº À¯¿¬¼º°ú È®À强ÀÌ
¶Ù¾î³ª One-to-One, One-to-Many, Many-to-One, Daisy Chain ±¸¼ºÀ» ÇÒ ¼ö
ÀÖ½À´Ï´Ù.
- Target Node´Â Production ServerÀÇ Àå¾Ö ½Ã Fail Over
±â´ÉÀ» Á¦°øÇÏ¿© Production ServerÀÇ ¼ºñ½º¸¦ °è¼ÓÀûÀ¸·Î Target Node°¡
Á¦°øÇÕ´Ï´Ù.
- ÇÑ °³ÀÇ Target Node´Â ¿©·¯ °³ÀÇ Source Node¿¡ ´ëÇÑ Àå¾Ö¸¦
°¨ÁöÇÏ¿© Àå¾Ö°¡ ÀÖÀ¸¸é Failover¸¦ ¼öÇàÇÕ´Ï´Ù.
- Source Node¿¡¼
LockingµÇ¾î ÀÖ´Â Open Fileµµ Target Node·Î ½Ç½Ã°£ º¹Á¦µÇ°í À̸¦ Tape
Backup ÀåÄ¡¿¡¼ ÀÌ»ó ¾øÀÌ BackupÇÒ ¼ö ÀÖ½À´Ï´Ù.
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