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min copy有疑問

min copy有疑問

MOUNT DSA0: /SHADOW=($1$DGA11:,$1$DGA12) SHADOWTEST/CLUSTER/POLICY=MINICOPY



我dism $1$DGA11:

然後再mount 回來

mount dsa0/shadow=$1$dga11/cluster shadowvol

卻發現還是會從0%開始同步

我確定dsa0 根本沒有資料異動,mount 回來應該不需要從0%開始吧



$1$DGA11: (VMS1) ShadowCopying 0 (copy trgt DSA0: 6% copied)

$1$DGA12: (VMS1) ShadowSetMember 0 (member of DSA0:)
2 回覆

min copy有疑問

你用dism $1$DGA11:當然不會

請用

dism $1$DGA11: /policy=minicopy=OPTIONAL

這樣才會 created write bitmap to track all writes to the shadow set

所以再mount 回來的時候

$ mount dsa0/shadow=$1$dga11/cluster shadowvol

就只會針對異動的部分resync









min copy有疑問



dism $1$DGA11: /policy=minicopy=OPTIONAL

會產生另一個bitmap,當資料異動的時候

Percent Populated會增加

看樣子很像是我原先的bit map Size不夠了,所以才每次都full sync

怎樣才能改bitmap size



$ show dev/bitmap dsa0

Device BitMap Size Percent Type of Master Active

Name ID (Bytes) Populated Bitmap Node

DSA0: 000B0001 4132 2.01% Mini Copy VMS1 Yes

00010002 2068 97.81% Mini Copy VMS1 Yes