Yes, the kind name is used in the key along with the id/name and
ancestor path and all contribute to the size.
Details: http://code.google.com/appengine/articles/storage_breakdown.html
On 20 Jul 2010, at 15:41, Didier Durand wrote:
@John Patterson,
I did not mention the Class / Kind in my answer for the following
reason: when I go to "Datastore Viewer" in the GAE Console and for
every entity, I see "Decoded key" and "Encoded key"
The encoded key is always - at least in my experience - a huge string
whatever the size of the decoded key (including the string for Kind)
is.
So, does it really matter to have a short Kind name if the encoded
version (probably the one used by Datastore) is huge?
I would be interested to know this if anyone knows.
regards
didier
On Jul 20, 8:27 am, John Patterson <[email protected]> wrote:
Also the class name is used in the Key as the kind. To get the
shortest keys you would need to use short class names and numeric
long
ids (rather than Strings). Having small keys is important because
they are stored many times per entity in indexes and more than once
for the entity itself.
I know that both Twig and Objectify have support for defining your
own
kind names without needing to actually rename your class to something
incomprehensible.
On 20 Jul 2010, at 11:11, Didier Durand wrote:
Hi Mark,
I would say yes: the datastore viewer shows the data with couples
(name,value), name being the origianal attribute name in the java
class.
Moreover the doc says "Each persistent field of the class
represents a
property of the entity, with the name of the property equal to the
name of the field (with case preserved)." at
http://code.google.com/appengine/docs/java/datastore/dataclasses.html
...
regards
didier
On Jul 19, 3:32 pm, Mark <[email protected]> wrote:
Hi,
I read in a post that the length of member variable names
contributes
to the amount of storage space your app uses, example:
class Farm {
private String mFarmersFavoriteCropToPlant;
}
would take more space to store than:
class Farm {
private String m;
}
might not matter for a handful of instances, but if I have
thousands
of records... is this true?
Thanks
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