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Lernmaterialien
HDD Read/Write Speed
0.25 GB/s
What are Append blobs?
Append blobs are comprised of blocks and are optimized for append operations. Blocks are added to the end of the blob only. Updating or deleting of existing blocks is not supported.
The maximum size of an append blob is slightly more than 195 GB
SSD Read/Write Speed
3.3 GB/s
DRAM Read/Write Speed
50 GB/s
What are block blobs? Max size?
Block blobs let you upload large blobs efficiently. Block blobs are comprised of blocks. The maximum size of a block blob is about 5 TB.
What are the 4 design principles of dynamo?
What are Page blobs? Maximum size?
Page blobs are a collection of 512-byte pages optimized for random read and write operations.
The maximum size for a page blob is 8 TB.
HTTP response code for a successful HTTP PUT operation for setting the replication factor in HDFS?
200
What can the values of a document in a document store be?
They can be Strings, integers, other documents, arrays and arrays of documents. Not all documents need to have the same fields.
What are the advantages of document stores over relational databases?
Flexibility. Not every record needs to store the same properties. New properties can be added on the fly.
If you upload a file of 150MB to HDFS how many blocks is it split into?
2, one of 128MB and one of 22MB
List 4 JSONiq functions you can use on sequences
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