KEP-2053keps/sig-node/2053-downward-api-hugepages

Downward API HugePages

implementablestablesig-nodelatest v1.271 open finding

KEP on GitHub kep.yaml Ask about this KEP

This KEP exposes hugepages in the downward API.

Facts

Authors: @saschagrunert @derekwaynecarr
Approvers: @dchen1107 @dashpole @sjenning
Reviewers: @dashpole @sjenning
PRR approvers: @johnbelamaricbeta@johnbelamaricstable
Tracking issue: #2053(opens GitHub in a new tab) closedcompletedclosed 2023-04-25 10:59 UTCmilestone v1.27sig/nodestage/stable
Milestones: alpha v1.20beta v1.21stable v1.27
Participating SIGs: none
Feature gates: DownwardAPIHugePages
Created / last updated: 2020-06-18 / none

Who decided each state, with the evidence.
Decided	Decision	Deciders	Evidence
2020-10-06 16:35 UTC	stage_graduation KEP-2053 set milestone.alpha to v1.20 in PR #2055, approved by dchen1107; merged by automation (k8s-ci-robot) on 2020-10-06.	@dchen1107 approve_command @dchen1107 lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@029967e82de37d614767387af71694b800eb23f0(opens GitHub in a new tab) StatusChange milestone.alpha ∅ → v1.20 (2020-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2055 Downward API support for HugePages(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/704398309(opens GitHub in a new tab)
2020-10-06 16:35 UTC	stage_graduation KEP-2053 set milestone.beta to v1.21 in PR #2055, approved by dchen1107; merged by automation (k8s-ci-robot) on 2020-10-06.	@dchen1107 approve_command @dchen1107 lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@029967e82de37d614767387af71694b800eb23f0(opens GitHub in a new tab) StatusChange milestone.beta ∅ → v1.21 (2020-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2055 Downward API support for HugePages(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/704398309
2020-10-06 16:35 UTC	stage_graduation KEP-2053 set milestone.stable to v1.22 in PR #2055, approved by dchen1107; merged by automation (k8s-ci-robot) on 2020-10-06.	@dchen1107 approve_command @dchen1107 lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@029967e82de37d614767387af71694b800eb23f0(opens GitHub in a new tab) StatusChange milestone.stable ∅ → v1.22 (2020-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2055 Downward API support for HugePages(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/704398309
2020-10-06 16:35 UTC	stage_graduation KEP-2053 graduated to alpha in PR #2055, approved by dchen1107; merged by automation (k8s-ci-robot) on 2020-10-06.	@dchen1107 approve_command @dchen1107 lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@029967e82de37d614767387af71694b800eb23f0(opens GitHub in a new tab) StatusChange stage ∅ → alpha (2020-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2055 Downward API support for HugePages(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/704398309
2020-10-06 16:35 UTC	status_transition KEP-2053 status set to implementable in PR #2055, approved by dchen1107; merged by automation (k8s-ci-robot) on 2020-10-06.	@dchen1107 approve_command @dchen1107 lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@029967e82de37d614767387af71694b800eb23f0(opens GitHub in a new tab) StatusChange status ∅ → implementable (2020-10-02)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2055 Downward API support for HugePages(opens GitHub in a new tab) Comment kubernetes/enhancements/issues/comments/704398309
2021-01-27 21:27 UTC	prr_approval johnbelamaric gave the production readiness approval for KEP-2053 at beta on 2021-01-27.	@johnbelamaric prr_approver	Document 2053.yaml(opens GitHub in a new tab)
2021-02-01 20:01 UTC	milestone_retarget KEP-2053 latest-milestone moved from v1.20 to v1.21 in PR #2352; merged by automation (k8s-ci-robot) on 2021-02-01.	@ehashman lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@95fc8a05a5b24e5ed9f125e448de5a4ecd94e801(opens GitHub in a new tab) StatusChange latest_milestone v1.20 → v1.21 (2021-01-27)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2352 intent to promote downward api for hugepages to beta(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/580713596(opens GitHub in a new tab)
2021-02-01 20:01 UTC	stage_graduation KEP-2053 graduated to beta from alpha in PR #2352; merged by automation (k8s-ci-robot) on 2021-02-01.	@ehashman lgtm @derekwaynecarr author @k8s-ci-robot merger	Commit kubernetes/enhancements@95fc8a05a5b24e5ed9f125e448de5a4ecd94e801(opens GitHub in a new tab) StatusChange stage alpha → beta (2021-01-27)(opens GitHub in a new tab) PullRequest kubernetes/enhancements#2352 intent to promote downward api for hugepages to beta(opens GitHub in a new tab) Review kubernetes/enhancements/pulls/reviews/580713596(opens GitHub in a new tab)
2023-01-10 10:44 UTC	prr_approval johnbelamaric gave the production readiness approval for KEP-2053 at stable on 2023-01-10.	@johnbelamaric prr_approver	Document 2053.yaml(opens GitHub in a new tab)
2023-02-08 18:01 UTC	milestone_retarget KEP-2053 latest-milestone moved from v1.21 to v1.27 in PR #3719, approved by mrunalp, derekwaynecarr, johnbelamaric; merged by automation (k8s-ci-robot) on 2023-02-08.	@saschagrunert author @mrunalp approver @mrunalp lgtm @johnbelamaric approve_command @derekwaynecarr approve_command @derekwaynecarr lgtm @bart0sh lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@dace705900d45a997bce7168d4cd16169912283c(opens GitHub in a new tab) StatusChange latest_milestone v1.21 → v1.27 (2023-01-10)(opens GitHub in a new tab)
2023-02-08 18:01 UTC	milestone_retarget KEP-2053 milestone.stable moved from v1.22 to v1.27 in PR #3719, approved by mrunalp, derekwaynecarr, johnbelamaric; merged by automation (k8s-ci-robot) on 2023-02-08.	@saschagrunert author @mrunalp approver @mrunalp lgtm @johnbelamaric approve_command @derekwaynecarr approve_command @derekwaynecarr lgtm @bart0sh lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@dace705900d45a997bce7168d4cd16169912283c(opens GitHub in a new tab) StatusChange milestone.stable v1.22 → v1.27 (2023-01-10)(opens GitHub in a new tab)
2023-02-08 18:01 UTC	stage_graduation KEP-2053 graduated to stable from beta in PR #3719, approved by mrunalp, derekwaynecarr, johnbelamaric; merged by automation (k8s-ci-robot) on 2023-02-08.	@saschagrunert author @mrunalp approver @mrunalp lgtm @johnbelamaric approve_command @derekwaynecarr approve_command @derekwaynecarr lgtm @bart0sh lgtm @k8s-ci-robot merger	Commit kubernetes/enhancements@dace705900d45a997bce7168d4cd16169912283c(opens GitHub in a new tab) StatusChange stage beta → stable (2023-01-10)(opens GitHub in a new tab)

Metadata, label and milestone changes, oldest first.Showing 1–10 of 45Rows

Status history
At	Kind	Field	Change	Actor	Evidence
2020-10-02 13:58 UTC	label	needs-sig added	none → needs-sig	@k8s-ci-robot	source(opens GitHub in a new tab)
2020-10-02 14:00 UTC	label	sig/node added	none → sig/node	@k8s-ci-robot	source

Relationships as stored, Person → KEP, from kep.yaml(opens GitHub in a new tab)
Person	Relationship
@saschagrunert GitHub(opens GitHub in a new tab)	—AUTHORED→
@derekwaynecarr GitHub(opens GitHub in a new tab)	—AUTHORED→
@dashpole GitHub(opens GitHub in a new tab)	—REVIEWS→
@sjenning

2 nodes · 1 relations

KEP 2

Relations and who declared them
Relation	KEP	Status	Declared by
see also	KEP-1539 HugePages	implemented	none

How they connect

Shortest paths in the graph between this KEP and its SIG or one of its people, up to four hops.

Impact of change

Rows returned by the tool
Kep	Depth	Reached	By hop	Open pull requests	Hop	Keps	Feature gates	Sigs	People
{ "label": "KEP", "key": "keps/sig-node/2053-downward-api-hugepages", "title": "Downward API HugePages", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages", "evidence_id": "pyniftqezfga", "number": 2053, "owning_sig": "sig-node", "status": "implementable", "stage": "stable", "latest_milestone": "v1.27", "milestone_alpha": "v1.20", "milestone_beta": "v1.21", "milestone_stable": "v1.27", "creation_date": "2020-06-18", "metadata_invalid": false }	2	11	{ "1": { "keps": 1, "feature_gates": 1, "sigs": 1, "people": 5 }, "2": { "keps": 1, "people": 2 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "label": "KEP", "key": "keps/sig-node/1539-hugepages", "title": "HugePages", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/1539-hugepages", "evidence_id": "2e6ejty32chw", "number": 1539, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.22", "milestone_alpha": "v1.18", "milestone_beta": "v1.19", "milestone_stable": "v1.22", "creation_date": "2019-01-29", "last_updated": "2021-05-12", "metadata_invalid": false } ]	[ { "label": "FeatureGate", "key": "DownwardAPIHugePages", "title": "DownwardAPIHugePages", "url": "https://github.com/kubernetes/enhancements/blob/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages/kep.yaml", "evidence_id": "aiy3gocz6tjj", "name": "DownwardAPIHugePages" } ]	[ { "label": "SIG", "key": "sig-node", "title": "Node", "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node", "evidence_id": "nrsuxu2xcxa7", "display_name": "Node", "sig_label": "node", "in_scope": true } ]	[ { "label": "Person", "key": "saschagrunert", "title": "saschagrunert", "url": "https://github.com/saschagrunert", "evidence_id": "seejx6hbo2ea", "login": "saschagrunert", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false }, { "label": "Person", "key": "dchen1107", "title": "dchen1107", "url": "https://github.com/dchen1107", "evidence_id": "frhgjvzxlrsh", "login": "dchen1107", "is_bot": false }, { "label": "Person", "key": "dashpole", "title": "dashpole", "url": "https://github.com/dashpole", "evidence_id": "uavosvxmo4c4", "login": "dashpole", "is_bot": false }, { "label": "Person", "key": "sjenning", "title": "sjenning", "url": "https://github.com/sjenning", "evidence_id": "iltstmtjiwi6", "login": "sjenning", "is_bot": false } ]
none	none	none	none	none	2	[ { "label": "KEP", "key": "keps/sig-node/6252-system-reserved-hugepages", "title": "Hugepages Reservation", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/6252-system-reserved-hugepages", "evidence_id": "d5m4oai2dgxb", "number": 6252, "owning_sig": "sig-node", "status": "implementable", "stage": "alpha", "latest_milestone": "v1.38", "milestone_alpha": "v1.38", "milestone_beta": "v1.39", "milestone_stable": "v1.41", "creation_date": "2026-07-20", "metadata_invalid": false } ]	none	none	[ { "label": "Person", "key": "piotrprokop", "title": "piotrprokop", "url": "https://github.com/piotrprokop", "evidence_id": "egn2zz5d6ocw", "login": "piotrprokop", "is_bot": false }, { "label": "Person", "key": "dawnchen", "title": "dawnchen", "url": "https://github.com/dawnchen", "evidence_id": "ewagkkmmgttb", "login": "dawnchen", "is_bot": false } ]

Rows returned by the tool
Kep	Depth	Reached	By hop	Open pull requests	Hop	Keps	Feature gates	Sigs	People
{ "label": "KEP", "key": "keps/sig-node/2053-downward-api-hugepages", "title": "Downward API HugePages", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages", "evidence_id": "pyniftqezfga", "number": 2053, "owning_sig": "sig-node", "status": "implementable", "stage": "stable", "latest_milestone": "v1.27", "milestone_alpha": "v1.20", "milestone_beta": "v1.21", "milestone_stable": "v1.27", "creation_date": "2020-06-18", "metadata_invalid": false }	2	11	{ "1": { "keps": 1, "feature_gates": 1, "sigs": 1, "people": 5 }, "2": { "keps": 1, "people": 2 } }	not in graph (merged pull requests only)	none	none	none	none	none
none	none	none	none	none	1	[ { "label": "KEP", "key": "keps/sig-node/1539-hugepages", "title": "HugePages", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/1539-hugepages", "evidence_id": "2e6ejty32chw", "number": 1539, "owning_sig": "sig-node", "status": "implemented", "stage": "stable", "latest_milestone": "v1.22", "milestone_alpha": "v1.18", "milestone_beta": "v1.19", "milestone_stable": "v1.22", "creation_date": "2019-01-29", "last_updated": "2021-05-12", "metadata_invalid": false } ]	[ { "label": "FeatureGate", "key": "DownwardAPIHugePages", "title": "DownwardAPIHugePages", "url": "https://github.com/kubernetes/enhancements/blob/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages/kep.yaml", "evidence_id": "aiy3gocz6tjj", "name": "DownwardAPIHugePages" } ]	[ { "label": "SIG", "key": "sig-node", "title": "Node", "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node", "evidence_id": "nrsuxu2xcxa7", "display_name": "Node", "sig_label": "node", "in_scope": true } ]	[ { "label": "Person", "key": "saschagrunert", "title": "saschagrunert", "url": "https://github.com/saschagrunert", "evidence_id": "seejx6hbo2ea", "login": "saschagrunert", "is_bot": false }, { "label": "Person", "key": "derekwaynecarr", "title": "derekwaynecarr", "url": "https://github.com/derekwaynecarr", "evidence_id": "wpnbg5qnq5fl", "login": "derekwaynecarr", "is_bot": false }, { "label": "Person", "key": "dchen1107", "title": "dchen1107", "url": "https://github.com/dchen1107", "evidence_id": "frhgjvzxlrsh", "login": "dchen1107", "is_bot": false }, { "label": "Person", "key": "dashpole", "title": "dashpole", "url": "https://github.com/dashpole", "evidence_id": "uavosvxmo4c4", "login": "dashpole", "is_bot": false }, { "label": "Person", "key": "sjenning", "title": "sjenning", "url": "https://github.com/sjenning", "evidence_id": "iltstmtjiwi6", "login": "sjenning", "is_bot": false } ]
none	none	none	none	none	2	[ { "label": "KEP", "key": "keps/sig-node/6252-system-reserved-hugepages", "title": "Hugepages Reservation", "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/6252-system-reserved-hugepages", "evidence_id": "d5m4oai2dgxb", "number": 6252, "owning_sig": "sig-node", "status": "implementable", "stage": "alpha", "latest_milestone": "v1.38", "milestone_alpha": "v1.38", "milestone_beta": "v1.39", "milestone_stable": "v1.41", "creation_date": "2026-07-20", "metadata_invalid": false } ]	none	none	[ { "label": "Person", "key": "piotrprokop", "title": "piotrprokop", "url": "https://github.com/piotrprokop", "evidence_id": "egn2zz5d6ocw", "login": "piotrprokop", "is_bot": false }, { "label": "Person", "key": "dawnchen", "title": "dawnchen", "url": "https://github.com/dawnchen", "evidence_id": "ewagkkmmgttb", "login": "dawnchen", "is_bot": false } ]

Kep

Depth

Reached

By hop

Open pull requests

Hop

Keps

Feature gates

Sigs

People

{
  "label": "KEP",
  "key": "keps/sig-node/2053-downward-api-hugepages",
  "title": "Downward API HugePages",
  "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages",
  "evidence_id": "pyniftqezfga",
  "number": 2053,
  "owning_sig": "sig-node",
  "status": "implementable",
  "stage": "stable",
  "latest_milestone": "v1.27",
  "milestone_alpha": "v1.20",
  "milestone_beta": "v1.21",
  "milestone_stable": "v1.27",
  "creation_date": "2020-06-18",
  "metadata_invalid": false
}

{
  "1": {
    "keps": 1,
    "feature_gates": 1,
    "sigs": 1,
    "people": 5
  },
  "2": {
    "keps": 1,
    "people": 2
  }
}

not in graph (merged pull requests only)

[
  {
    "label": "KEP",
    "key": "keps/sig-node/1539-hugepages",
    "title": "HugePages",
    "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/1539-hugepages",
    "evidence_id": "2e6ejty32chw",
    "number": 1539,
    "owning_sig": "sig-node",
    "status": "implemented",
    "stage": "stable",
    "latest_milestone": "v1.22",
    "milestone_alpha": "v1.18",
    "milestone_beta": "v1.19",
    "milestone_stable": "v1.22",
    "creation_date": "2019-01-29",
    "last_updated": "2021-05-12",
    "metadata_invalid": false
  }
]

[
  {
    "label": "FeatureGate",
    "key": "DownwardAPIHugePages",
    "title": "DownwardAPIHugePages",
    "url": "https://github.com/kubernetes/enhancements/blob/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/2053-downward-api-hugepages/kep.yaml",
    "evidence_id": "aiy3gocz6tjj",
    "name": "DownwardAPIHugePages"
  }
]

[
  {
    "label": "SIG",
    "key": "sig-node",
    "title": "Node",
    "url": "https://github.com/kubernetes/community/tree/440e496d3a172234d81728df1bfe43849b589adf/sig-node",
    "evidence_id": "nrsuxu2xcxa7",
    "display_name": "Node",
    "sig_label": "node",
    "in_scope": true
  }
]

[
  {
    "label": "Person",
    "key": "saschagrunert",
    "title": "saschagrunert",
    "url": "https://github.com/saschagrunert",
    "evidence_id": "seejx6hbo2ea",
    "login": "saschagrunert",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "derekwaynecarr",
    "title": "derekwaynecarr",
    "url": "https://github.com/derekwaynecarr",
    "evidence_id": "wpnbg5qnq5fl",
    "login": "derekwaynecarr",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "dchen1107",
    "title": "dchen1107",
    "url": "https://github.com/dchen1107",
    "evidence_id": "frhgjvzxlrsh",
    "login": "dchen1107",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "dashpole",
    "title": "dashpole",
    "url": "https://github.com/dashpole",
    "evidence_id": "uavosvxmo4c4",
    "login": "dashpole",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "sjenning",
    "title": "sjenning",
    "url": "https://github.com/sjenning",
    "evidence_id": "iltstmtjiwi6",
    "login": "sjenning",
    "is_bot": false
  }
]

[
  {
    "label": "KEP",
    "key": "keps/sig-node/6252-system-reserved-hugepages",
    "title": "Hugepages Reservation",
    "url": "https://github.com/kubernetes/enhancements/tree/5b503a75369bdfdd494a2c2c72107a41bf6dd1a8/keps/sig-node/6252-system-reserved-hugepages",
    "evidence_id": "d5m4oai2dgxb",
    "number": 6252,
    "owning_sig": "sig-node",
    "status": "implementable",
    "stage": "alpha",
    "latest_milestone": "v1.38",
    "milestone_alpha": "v1.38",
    "milestone_beta": "v1.39",
    "milestone_stable": "v1.41",
    "creation_date": "2026-07-20",
    "metadata_invalid": false
  }
]

[
  {
    "label": "Person",
    "key": "piotrprokop",
    "title": "piotrprokop",
    "url": "https://github.com/piotrprokop",
    "evidence_id": "egn2zz5d6ocw",
    "login": "piotrprokop",
    "is_bot": false
  },
  {
    "label": "Person",
    "key": "dawnchen",
    "title": "dawnchen",
    "url": "https://github.com/dawnchen",
    "evidence_id": "ewagkkmmgttb",
    "login": "dawnchen",
    "is_bot": false
  }
]

MATCH (k:KEP {key: $key}) RETURN k LIMIT 1 ; MATCH (k:KEP {key: $key}) MATCH path = (k)-[:REPLACES|SUPERSEDED_BY|SEE_ALSO|GATED_BY*1..2]-(n) WHERE n <> k AND (n:KEP OR n:FeatureGate) AND all(x IN nodes(path)[1..-1] WHERE x <> k AND (x:KEP OR (x:FeatureGate AND NOT x.key IN $placeholders))) WITH n, path ORDER BY length(path), [x IN nodes(path) | x.key] WITH n, collect(path)[0] AS path RETURN n AS node, length(path) AS hop, path ORDER BY hop, n.key LIMIT 150 ; UNWIND $keys AS kk MATCH (k:KEP {key: kk}) RETURN k.key AS kep, [(k)-[r_0:OWNED_BY]->(s_0:SIG) WHERE coalesce(r_0.valid_to, $open) = $open | s_0] AS sigs, [(p_1:Person)-[r_1:AUTHORED]->(k) WHERE coalesce(r_1.valid_to, $open) = $open AND coalesce(p_1.is_bot, false) = false | p_1] AS authors, [(p_2:Person)-[r_2:APPROVES]->(k) WHERE coalesce(r_2.valid_to, $open) = $open AND coalesce(p_2.is_bot, false) = false | p_2] AS approvers, [(k)-[r_3:TRACKED_BY]->(i_3:Issue) WHERE coalesce(r_3.valid_to, $open) = $open AND i_3.state = 'open' | i_3] AS open_issues LIMIT 200

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Impact of change

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