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Difference between partition key, composite key and clustering key in Cassandra?
...wo int,
k_clust_one text,
k_clust_two int,
k_clust_three uuid,
data text,
PRIMARY KEY((k_part_one, k_part_two), k_clust_one, k_clust_two, k_clust_three)
);
Behind these names ...
The Partition Key is responsible for data distribution across your nodes.
The C...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...red with MessagePack.
BSON has special types like "ObjectId", "Min key", "UUID" or "MD5" (I think these types are required by MongoDB). These types are not compatible with JSON. That means some type information can be lost when you convert objects from BSON to JSON, but of course only when these sp...
Amazon S3 direct file upload from client browser - private key disclosure
...image/jpeg" /><br />
<input type="hidden" name="x-amz-meta-uuid" value="14365123651274" />
Tags for File: <input type="input" name="x-amz-meta-tag" value="" /><br />
<input type="hidden" name="AWSAccessKeyId" value="AKIAIOSFODNN7EXAMPLE" />
<input ...
Is there a quicker / better way to clear the iPhone Simulator cache than deleting its directory?
... this command takes forever to run, how to select target sim with uuid?
– the_prole
Jun 1 '18 at 16:32
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Common MySQL fields and their appropriate data types
...T, UNSIGNED |
| uuid | CHAR(36) | or CHAR(16) binary |
| title | VARCHAR(255) | ...
What is the difference between URI, URL and URN? [duplicate]
... example:
urn:isbn:0451450523 to identify a book by its ISBN number.
urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66 a globally unique identifier
urn:publishing:book - An XML namespace that identifies the document as a type of book.
URNs can identify ideas and concepts. They are not restricted to...
What is the difference between a URI, a URL and a URN?
... example:
urn:isbn:0451450523 to identify a book by its ISBN number.
urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66 a globally unique identifier
urn:publishing:book - An XML namespace that identifies the document as a type of book.
URNs can identify ideas and concepts. They are not restricted to...
How do I add a placeholder on a CharField in Django?
... For chinese, you need the preceeding u like this: {'placeholder': u'搜索'}
– shellbye
Oct 14 '17 at 3:52
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What are the use cases for selecting CHAR over VARCHAR in SQL?
...I was forced to store a md5 checksum in a char in mssql that didn't have a uuid type... and i didn't ever want anything < 32 bytes... also put a constraint on the column).
– joefromct
Dec 1 '17 at 21:02
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JavaScript hashmap equivalent
...omplex as using some cryptographic hashes like in DojoX encoding, or DojoX UUID. While the latter solutions may produce unique keys, personally I try to avoid them at all costs, especially, if I know what makes my objects unique.
Update in 2014: Answered back in 2008 this simple solution still requi...