Comments (4)
Because the FlashDB uses the binary search algorithm to search TSDB. The search will cause problems when timestamp cannot keep incrementing.
from flashdb.
If the binary search is used just for iteration functions then what about make this feature less restrictive? I see few options:
- Allow to save such values and print warning message like "The saved timestamp is before the last saved entry - the search functions may work incorrectly"
- Add configuration option (#define) to disable timestamp check. This option should be well commented, with information that enabling this option can break up searching functionality if newly saved item timestamp is lesser than previous, use it at your own risk.
from flashdb.
If you know it's wrong, why do you do it?
from flashdb.
Well, this will work if it's necessary just to display last 100 saved records. Also this will prevent situations like I described in my first message - when the date was changed to the future and then changed back. Because there is no functionality to delete specific TSDB record it can lead to a deadlock - you will not be able to save anything until you either clean whole partition or wait until your actual date will be greater than last saved.
from flashdb.
Related Issues (20)
- 测试tsdb连续保存累计数达一定数量后出现前面部分数据丢失的现象 HOT 2
- 用文件作为存储后端,有锁首次初始化时,_fdb_kv_load 中调用 fdb_kv_set_default 死锁 HOT 2
- 老化擦写Flash的KV后,读取一个不存在的KV或者写一个不存在的KV,Flash耗时长
- check the current timestamp, MUST more than the last save timestamp HOT 4
- 是否支持STM32G0B1RCT6 HOT 6
- 分区越大,插入速度越慢 HOT 2
- sfud_flash_def.h 部分有误 HOT 4
- KVDB Demo 运行出错 HOT 1
- linux的demo程序第一次运行都会卡住 HOT 2
- Error: The KV (@0x0000FF4F) CRC32 check failed!
- Support wear balance
- tsdb
- FR:tsdb读取最新一条数据内容 HOT 1
- TSDB能否调整为递增序列式。 HOT 1
- V2.1.0使用tsdb遇到一个问题,假如tsdb刚好全部写满的时候重启了,再次开机 初始化tsdb的时候,会出现oldest sectors is 0x00000FFF, current using sector is 0xFFFFFFFF, 导致后续无法写入 HOT 1
- 迭代器无法遍历所有键值对 HOT 2
- FDB_GC_EMPTY_SEC_THRESHOLD我想问这个能设置成0吗,我现在只想分配2个扇区给flashDB
- fdb_tsl_status_t end_info_stat[2]这里结束信息为啥需要2呢? HOT 1
- 如何主动进行一次GC
- tsdb 写数据的时候突然重启设备,重启后设备 db->last_time 变成0开始 HOT 10
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from flashdb.