kvdb写满后，写入同名键值对无法写入无法覆盖，且kv大小是扇区的一半时，空间利用率最差，只有一半，fdb_kv_print打印的kv也不全但是get能读到

[YanChao001]

letter:/$ file -l

test1=blob @0x00000019 1024bytes
test2=blob @0x00000819 1024bytes
test3=blob @0x00001019 1024bytes
test4=blob @0x00001819 1024bytes
test5=blob @0x00002019 1024bytes
test6=blob @0x00002819 1024bytes
test7=blob @0x00003019 1024bytes
test8=blob @0x00003819 1024bytes
test9=blob @0x00004019 1024bytes
test10=blob @0x0000481A 1024bytes
test11=blob @0x0000501A 1024bytes
test12=blob @0x0000581A 1024bytes
test13=blob @0x0000601A 1024bytes
test14=blob @0x0000681A 1024bytes
test15=blob @0x0000701A 1024bytes
test16=blob @0x0000781A 1024bytes
test17=blob @0x0000801A 1024bytes
test18=blob @0x0000881A 1024bytes
test19=blob @0x0000901A 1024bytes
test20=blob @0x0000981A 1024bytes
test21=blob @0x0000A01A 1024bytes
test22=blob @0x0000A81A 1024bytes
test23=blob @0x0000B01A 1024bytes

mode: next generation
size: 24141/47104 bytes.
letter:/$ file -w test1

[FlashDB][kv][user][kvdb_user] (../Code/ThirdParty/FlashDB/src/fdb_kvdb.c:928) Trigger a GC check after alloc KV failed.
[FlashDB][kv][user][kvdb_user] Warning: Alloc an KV (size 1041) failed when new KV. Now will GC then retry.
[FlashDB][kv][user][kvdb_user] (../Code/ThirdParty/FlashDB/src/fdb_kvdb.c:1149) The remain empty sector is 1, GC threshold is 1.
[FlashDB][kv][user][kvdb_user] (../Code/ThirdParty/FlashDB/src/fdb_kvdb.c:928) Trigger a GC check after alloc KV failed.
[FlashDB][kv][user][kvdb_user] Error: Alloc an KV (size 0) failed after GC. KV full.
letter:/$

[armink]

这个 KV 格式是 blob 类型，并不是可以支持打印的 string 字符串，所以不会显示的，只会显示大小