32. Attribute Item Type Description Allowed Values Default Value
expiretime All Item expiration time 4 bytes singed integer
> 0: never expired
> 양수: expired in the future
0
type All Item type “kv”, “list”, “set”, “b+tree” N/A (read only)
count Collection Current # of elements 4 bytes unsinged integer N/A (read only)
maxcount Collection Maximum # of elements 4 bytes unsinged integer 4000
overflowaction Collection Overflow action “error” – all collections
“head_trim” – list only
“tail_trim” – list only
“smallest_trim” – b+tree only
“largest_trim” – b+tree only
list : “tail_trim”
set : “error”
b+tree :
“smallest_trim”
readable Collection Readable flag “on”, “off” “on”
maxbkeyrange B+tree only Maximum bkey range 8 bytes unsinged integer or
hexadecimal (max 31 bytes)
0
48.
Consistent hash ring
A
C
BD
Application
Client library
Client 1
Application
Client library
Client 2
Coordination
Service
Configuration
Server state
Controller state
Master Slave
Semi-synchronous
Replication
Key=“item1”
Key=“item2”
Replica Group
Stash
always
synchronous