尝试读取增量日志文件Databricks 社区版簇。 (databricks-7.2版本)
df=spark.range(100).toDF("id")
df.show()
df.repartition(1).write.mode("append").format("delta").save("/user/delta_test")
with open('/user/delta_test/_delta_log/00000000000000000000.json','r') as f:
for l in f:
print(l)
Getting file not found error:
FileNotFoundError: [Errno 2] No such file or directory: '/user/delta_test/_delta_log/00000000000000000000.json'
---------------------------------------------------------------------------
FileNotFoundError Traceback (most recent call last)
<command-1759925981994211> in <module>
----> 1 with open('/user/delta_test/_delta_log/00000000000000000000.json','r') as f:
2 for l in f:
3 print(l)
FileNotFoundError: [Errno 2] No such file or directory: '/user/delta_test/_delta_log/00000000000000000000.json'
我尝试过添加/dbfs/
,dbfs:/
什么也没解决,仍然遇到同样的错误。
with open('/dbfs/user/delta_test/_delta_log/00000000000000000000.json','r') as f:
for l in f:
print(l)
但使用dbutils.fs.head
我能够读取该文件。
dbutils.fs.head("/user/delta_test/_delta_log/00000000000000000000.json")
'{"commitInfo":{"timestamp":1598224183331,"userId":"284520831744638","userName":"","operation":"WRITE","operationParameters":{"mode":"Append","partitionBy":"[]"},"notebook":{"","isolationLevel":"WriteSerializable","isBlindAppend":true,"operationMetrics":{"numFiles":"1","numOutputBytes":"1171","numOutputRows":"100"}}}\n{"protocol":{"minReaderVersi...etc
我们如何阅读/cat adbfs file
在数据块中python open method
?